The higher end table saws is probably a different story, they are even smaller manufacturers, but a lot of that stuff is different anyway.
I guess the benefit to SawStop is that they sell a better product, but turns out most people won't pay 2-3x the price for the added benefit. If they can make everyone implement the same feature, then they still probably won't compete on price, but the price difference will go down, and perhaps people will pay a low to medium premium for a slightly better safety mechanism.
As far as regulatory capture goes, it doesn't sound particularly nefarious. I do believe that the folks at SawStop genuinely believe this is necessary regulation.