EXACTLY!!!!
The audience for Matthew 24 was everyone who would ever read it. Unless you want to argue that God had no idea we would still be reading it today.
If the Church is to be on the earth during the Tribulation, what exactly would be the point of the two witnesses who preach and work miracles for 3 1/2 years and the sealing of the 144,000 Jewish witnesses?
The church would still be around to testify of God and warn of the anti-Christ if the post trib rapture were correct.
God never leaves Himself without a witness on the earth. They would only be needed if the Church were not around.