Most Christians don't read the Bible deeply, but rely upon others to do the heavy lifting.

Once you start intensive study, often due to passionate belief or taking witnessing classes, then the Pre-Tribulation Rapture dogma doesn't hold up to scrutiny.

Then when you find out about all of Dispensational theology, from Darby to Scofield to present day, you see how heretical it ALL is.

The Pre-Tribbers would be wise to do this last bit.