It's clear and obvious. Why do people still insist in some sort of secret randomly selected event?
I think I may know why after thinking about it. Fear. They're afraid, that if Christians are here during the tribulations that God can't or wont protect them from wrath. So, they reason, that because there's wrath, and we in Christ wont experience wrath, then we must not be here. DESPITE the Bible clearly stating the order of events.
No man knows the day or the hour, true. But, Jesus gave us warnings, and He even said, "See, I have told you beforehand...." We dont' know the day or the our of the end of the events, yet, we know when the time is near. That's why Jesus said to be wise and keep watch. Why keep watch if we don't even know the signs? Why keep watch if it's just going to be over for us abruptly?
This is the single most frustrating topic to discuss. There was a time when I could actually see how people got the rapture idea from the Bible. Now, I can't even see a hit of rapture written in the Word of God.
Those who don't belong to God can't understand the Bible but they can understand doctrine. I'm becoming more and more convinced that many people are simply unable to see the fact that the "proof verses" for a pretribulation rapture don't say what they're claiming they say because they can't understand what's written. If they could understand, they would, because the Bible is extremely clear on this subject.
In other words, some people cling to doctrine because it's all they have.