You're thinking in terms of braking, I'm thinking in terms of positioning.
No doubt the maximum breaking is achieved by applying the brakes all the way, however in the cases where is clear that braking isn't going to cut it, "falling" separates you from the bike and thus the trajectory of it. Similar is my approach towards sliding the rear, positioning yourself in a way that may give you an advantage in that particular situation.
Of course in most cases the above is useless but in the rare occasion where I might need to lock the rear, I want to be able to do so.
Edit after reading the above post: To be honest most of my breaks locking thoughts come from dirt-bike riding, I've never had to lock the breaks in pavement to avoid anything (and hopefully none will) so I might be just thinking with the wrong parameters in mind.
Okay, I can see where you're coming from now -- dirt and pavement are two different beasts with different ways of riding them. On dirt there are times it may be better to lock a front tire.
I'm not sure I fully agree with you regarding separating yourself from the bike, though. Inertia dictates that if you separate yourself from the bike, you're still going to follow the bike or the bike is going to follow you. (Alternately, you might be able to get yourself to the side of the bike.) It might be advantageous to have the bike hit first, but either way it's going to hurt.
You're a better rider than I if you can manage to get the bike into a superior position before the crash. I've crashed on street once before and all I could do was say "Oh S***!!!!". Looking back, I had plenty of time to react, but I didn't. It was a learning experience.
They all manage to get away with it their whole lives, it's just that for some, this is a shorter period of time than for others.
That was funny
. And true.
Of course, I think sportbike riders lie to themselves, but it happens so fast they can't call it "laying it down". It's more like the bike laid them down.