don't put all your egg's in one basket.
It makes more sense for Honda to keep a dominant rider in each series. Why have Honda finishes 1,2,3 in FIM WSB when they can have a guy going for the championship in each series. Why do you think Steve Crevier has won a bunch of Canadian Titles but hasn't been bumped up to WSB or AMA. Honda wants the best rider they can get in each series. Why create competition for yourself?