The supporters for the false belief in a pre-trib rapture love to parrot "There must be a pre-trib rapture because the word 'Church' is not mentioned in the book of Revelation." Besides everyone knows the actual church is the believer and are scriptures that gives us the timing of the rapture, that line of reasoning is foolish at best, but moreso this false doctrine is purposefully taught to support wrong theology.
Could one of the reasons there is no sense of the gatherings of believers be because many leaders of traditional Churches become so corrupted by Satan and under the influence of the Devil, that God's Remnants flee them for the sake of their salvation?
11 And have no fellowship with the unfruitful works of darkness, but rather reprove them. 12 For it is a shame even to speak of those things which are done of them in secret.