Seriously, what evidence do you have to support that this happens to most cyclists? I'll give you that it's somewhat common and I don't believe it's anything to be ashamed about, but why do you feel that you need to project that it happens to everyone, nearly everyone (99% as you said), or most people. Do you have to feel that it happens to nearly everyone to be ok with having fallen?

So I repeat, I don't understand what is so difficult about unclipping when you start to fall over.

Edit: From what I've read of this happening, it seems that it may be somewhat linked to the type of pedal used, which is why I asked.