Originally Posted by wiseblood
Sure, why not?
Because they're already at the edge of traction when they're leaned over and accelerating out of a turn. Countersteering would add unwanted and abrupt additional load on the front. Recent example: when Pedrosa crashed at Phillip Island on the hairpin, he went in too deep and tried to pull it back around (countersteering or not), put too much load on the front and lowsided.
What we do at 40mph to avoid an unseen obstacle in a canyon corner is a whole different deal than what they're doing at 10/10ths on a closed circuit.