Erik... we do understand what you are saying. Just so you know, I have had problems with scanners not being able to read my passport. Many airport e-ticket scanners ask for your passport for scanning, and mine rarely works. But at the point the clerk verifies it manually.
So we do get your point. I do not know if a bent passport is impossible to use or not. But I agree with you that a valid passport should be accepted even if it means they have to take extra time to verify it.