Maybe you've over looked the part of being ready. We convince our selves that He could come at any moment so that we would be ready. In other words living with the expectation of being raptured at any moment causes us to live a more Godly life. How else would you suggest to stay ready as the story of the virgins, 5 were and 5 were not. Those who were not ready were left behind.
The parable's point has more to do with salvation.
Now are you suggesting that if a pre-tribulational rapture happens that only pre-tribulational dispensationalists will be taken, leaving the rest of Christendom to fend for themsleves?
Or are you implying a split-rapture concept?
Either of those views are highly incompatible with Scripture imho. I am sympathetic to the traditional pre-trib/pre-mil view (probably because my eschatological view is historical pre-mill.) Suggesting either of these alternatives is simply out of bounds with the testimony of Scripture.
We are to be mindful of the chance of the second coming, but not consumed with it. I see more teaching about living a Christ-centered life amongst people than huddling up and getting neck cramps from staring at the sky waiting for Jesus.