Ah, but while with washout the stall may be more abrupt this is a far better state of affairs than to have the tips stall first. A "nice" stall is where the center section stalls first and the tips, that keep the plane stable through the sort of stall manage to hang on bitterly so you still maintain control rather than falling off to one side or the other.

Deploying flaps around the center not only increases the camber of the area with the flaps but it also severly shifts the angle of attack of the flapped section in a positive way. In effect it results in extreme washout but makes the plane more stable by doing so.

Granted a lot has to do with each designer's ideas but I'd rather see a healthy amount of washout and avoid the tips stalling before the rest of the wing.