Why do people take the Fermi Paradox as evidence against alien life?

i don't think most people take it as evidence that no life exists anywhere else in the universe

it does seem like a pretty good indication that civilizations advanced enough to travel or at least communicate over interstellar distances, are either non existent, or exceedingly rare and transitory.  i think they're probably rare and transitory

Ignorance, fear, denial, cynicism, lack of curiosity and having a closed mind ate the major reasons. Many people resist having their concepts of how they think the Universe works or how they assume or think the Universe SHOULD work questioned.

When they come across the Drake equation and find out we have. O idea what numbers should be stuck into that question, that is proof to them that scientists are either stupid or do not understand what they are talking about or are internally lying to deceive the general public. They project and transfer themselves onto the scientists. If and when expose their hypocrisy, uncoordinated or false facts and illogical thinking, they scream and claim they are the abuse victims


You can't open a closed, fearful, paranoid mind. They think they know how to survive and refuse to acknowledge that ignorance can be very fatal.

I don't think we should rule out other advanced civilisations in the universe. But, why should they have visited Earth? We haven't yet managed to send a managed mission to out next door neighbour Mars. Why would you expect another civilisation to have travelled a distance far greater and to have overcome all the problems associated with that. It seems to me a lot of people dwell in the reals of science fiction and not real science. Fiction like 'Star Trek' is simply not real.

It's not so much evidence - but an interpretation of an hypothesis that they use to bolster their belief that there's no one out there.  Honestly, we don't know all variables leading to the possibility of extraterrestrial life - we're just guessing.  While it's *possible* that we're the only planet with life in the universe, that's not the way I'd bet. While it's *possible* that we're the only advanced species in the universe, again - that's not the way I would bet... 

But - until there's evidence (either way) found... all anyone has is guesses and conjecture.  It's okay to have an opinion - but until we know more... that's all it is.

It is not meant to be Evidence
But a Mathematical Theory
 Surmising that Absence of Proof is not Proof of Absence
And if you Assume, you can make an A$$ of U and Me

Fermi proposed a theory as a possible answer to the question of why we (Earth) have not received any form of communication from another species, it is not a piece of evidence. It does not say that there are no aliens, good luck.

The Fermi Paradox questions why aliens haven't come to Earth and made contact with us.
Fermi assumes there probably is alien life but proposes many theories why they haven't contacted us yet.

Elon Musk has also considered the simulation hypothesis as a potential solution to the Fermi paradox: "
The absence of any noticeable life may be an argument in favour of us being in a simulation ... Like when you're playing an adventure game, and you can see the stars in the background, but you can't ever get there. If it's not a simulation, then maybe we're in a lab and there's some advanced alien civilization that's just watching how we develop, out of curiosity, like mould in a Petri dish ... If you look at our current technology level, something strange has to happen to civilizations, and I mean strange in a bad way. ... And it could be that there are a whole lot of dead, one-planet civilizations."

He himself may have been an Alien in this country.
There are other Beings if Heaven they are called Angels which are Creatures created by Our Creators.
Its vel vely simple.

True, you can't say something does not exist until you have searched everywhere for it.


But the fact is that the vast majority of the universe is totally invisible to us due to distance. All galaxies but the closest are detectable as nothing more than feint blurs on a photographic plate. We cannot even see stars in them, let alone planets or anything else. So it will never be possible to say that space aliens, space fairies, space tooth fairies or anything else does not exist.


But what can be done is to examine what tiny fraction of the universe is scrutable by us, and try to find what we are seeking therein. If it can't be found, then we CAN say that space fairies, aliens or whatever definitely do not exist within detection distance.


In fact centuries of astronomical observation with the most sophisticated instruments, and decades of searching on tens of billions of radio signals has never produced the slightest hint of space aliens.


We thus conclude that we are alone. I suggest that the fact should be celebrated as a major discovery, rather than seen as anything negative, or something to go into denial over.

They don't - the Fermi Paradox poses a question and "there's no one there" is just one of a number of possible answers.  

Alien life exists or has existed, or will exist---
--somewhere
--and it is of some type
--and it lasts for some period of time.
You have given an unreasonably restrictive volume of space.  10 ly radius sphere is tiny, only a dozen  stars exist that close to us.  Many are the wrong type, or we have found no planets around them yet.  Try 100, 1000, 100,000, 10 million ly to be more effective.
Some type might be disappointing more often than not.  How to have a relationship with a puddle of ooze?  Or a bank of computers left over from a defunct organic civilization?
Most civilizations, and most comfortable conditions for life are brief in comparison to the universe's existence.  How does that compare to ours?