Does he seriously believe that Honda, Suzuki, and Kawasaki would just LEAVE motocross racing? They would obviously realize that if they did that, all the teenagers who can't see past their TV would be saying, "d00d, all da pros be ridin Yamaha, wen i get some moneys fo a bike itz all blue all da way bro."
And this is obviously a stupid argument to make, because once upon a time they skewed the rules vastly in favor of four-strokes when ONLY ONE of the manufacturers made one!
Also, he basically says here that he realizes that the riders and the general public would like to see two-strokes, but the people with the money don't, and so therefore it's obvious which path we have to take. I mean, we wouldn't want for privateers to be a big force in racing! They're just there fill the track up and make it look more action-y, but the only racing that anyone needs to give a shit about is the kind between two dudes who each own Learjets and have thousands of men working full-time on their team. The privateers might as well just go home and let the TV stars battle it out one-on-one, for all anyone in the management cares.