Did Corrie Ten Boom believe that there would be NO rapture, or did she just deny the pre-tribulation rapture?
If she says no rapture, she is dead wrong.
Belief in being raptured and being prepared for persecution are not mutually exclusive. In fact, the former provides the latter.
We will be exempt (raptured) from the wrath of God, not persecution. We will not go through the tribulation, but that is not to say there wont be plenty of tough times before then.