You think only lost people would think no matter how fleshly they are will NOT be raptured before the Tribulation? It would seem the opposite is true.
So isn't this counter to the gospel of Jesus, for Jesus holds believers accountable and He is sovereign, so you can't demand of him you will be raptured before the Tribulation no matter how carnal you choose to be?
There are various references to tribulation in the Bible, that the church will go through in the dispensation of grace, tribulations Israel will undergo, but we are only talking about the Tribulation of the last week of Daniel's seven here in which Rev. 3.10, Luke 21.36 and Matt. 24.42 tell us to be received before the Tribulation to the throne (Rev. 7.) before the 7 trumpets of the Tribulation (ch.8ff), you would need to keep the word of His patience, be watchful and prayerful to be accounted worthy, which not all Christians do.
Let us preserve God's Word not according to the flesh.