Do you think its fair for someone to be your boss at work if they have never done your job? ?

Life's not fair. Get used to it. What I think doesn't matter.

It happens all the time. CEOs don't need to clean bathrooms for 3 months.

Your whore mother got fvcked by her father that’s how you inbred scumbag trash got born 

No!              

Very common, and ok.  

Of course. Is the president of a company supposed to have spent time in every possible role within the company?

This is normal.  Not all people become a boss from starting at the bottom...as a worker bee.  Most bosses are hired due to their college degree.