The word Rapture doesn't appear anywhere in the Bible 'why do so many believe in it?

Matthew 24:36-44.
No One Knows the Day or Hour.
36 “But of that day and hour no one knows, not even the angels of [a]heaven, but My Father only. 37 But as the days of Noah were, so also will the coming of the Son of Man be. 38 For as in the days before the flood, they were eating and drinking, marrying and giving in marriage, until the day that Noah entered the ark, 39 and did not know until the flood came and took them all away, so also will the coming of the Son of Man be. 40 Then two men will be in the field: one will be taken and the other left. 41 Two women will be grinding at the mill: one will be taken and the other left. 42 Watch therefore, for you do not know what [b]hour your Lord is coming. 43 But know this, that if the master of the house had known what [c]hour the thief would come, he would have watched and not allowed his house to be broken into. 44 Therefore you also be ready, for the Son of Man is coming at an hour you do not expect.

Who will be left on earth, then the end of humanity will come, and afterwards, God's judgment!

BUT THE CONCEPT IS THERE....THERE IS A VERSE WHERE GOD SAYS "COME UP HERE" AND HE WILL LIFT UP THE SAVED!!

Harpazo is the Bible word in Greek. 1 and 2 Thessalonians, Revelation, 1 Corinthians 15, and other places talk about the rapture. From the earliest days of Paul the apostle, the rapture is a fact of Bible doctrine. Liars would say "it was invented in the 1800's", because they hate the reality that the Lord is coming.
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Nobody can be good enough to avoid hell. The truth is that death leads to immediate heaven or hell, depending only on whether the person believed in Jesus for eternal life, or not.
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The truth is that Jesus loves you and wants to bless your life freely :) Most of all, Jesus wants you with Him forever, and not in hell. The truth is that every belief except one will lead to eternal torment in the lake of fire for every person. Because nothing pays for our sins except the death and blood of Jesus, the sacrifice of Jesus that is already accomplished by Him . Jesus loves you! The truth is that Jesus is God, and Jesus died on the cross to pay for all of our sins in full, and then Jesus resurrected from the dead. Nothing else pays for our sins, not works, not deeds, not religions. So the only way to heaven and to avoid hell, is by believing in Jesus for eternal life (John 6:47), without adding any of your own works (Romans 4:5). Believe in Jesus to take you to heaven, and you will be in heaven, no matter what, guaranteed. That easy, thanks to Jesus! Tell Jesus that you thank Him that you will be with Him in heaven when you die, because you believe in Jesus! It is too late to be saved, after death

Read 1 Thessalonians 4:13-17. In part: "After that, we who are still alive and are left will be caught up together with them in the clouds to meet the Lord in the air. And so we will be with the Lord forever."

You are correct "Rapture" is not there. The church called "caught up ... in the clouds" a Spiritual Rapture because they had no other word for the prophetic event.

It sounded like a good way to scare people into falling in line.

the ratchet jaws heard all over, spreading deception as they were deceived as well.....it's a set-up for when the fake shows up soon, pretending to be, what he is not, and never could be....

Even though the word rapture does not appear anywhere in the Bible, it is understood by some persons, but not by all, to be the meaning of 1 Thessalonians 4:17. Some place the rapture ahead of the great tribulation. Others expect it during that time. Still others think that the rapture will come after that unparalleled distress.

There is no rapture. The gathering back to Christ happens after the Tribulation of the antichrist.

2 Thessalonians Chapter 2.

1 Now we beseech you, brethren, by the coming of our Lord Jesus Christ,
and by our gathering together unto him,

2 That ye be not soon shaken in mind, or be troubled, neither by spirit, nor by word,
nor by letter as from us, as that the day of Christ is at hand.

3 Let no man deceive you by any means: for that day shall not come, except there come
a falling away first, and that man of sin be revealed, the son of perdition;

A person can battle false teachings and beliefs using the rosary and fasting.

I have heard that the Latin Vulgate has the word rapture in it