It's an uneasy balance and it will be interesting to see where it goes once the dust settles on the current antitrust actions against big tech. I can't really think of a good reason why the iPhone should be a generalized computing device that is pryed open from Apple's clutches, while Nintendo, for example, can still run their own app store and would not be required to allow things like sideloading and root access while a smartphone manufacturer would. What makes one a computer, and the other an appliance?
(I'm saying this all as a right-to-repair and antitrust advocate, by the way)
I think a lot of this is a result of nostalgia, and a recognition that the business model of the video game industry has depended on this sort of control for a significantly longer than the personal computing industry. So no one really wants to kill Nintendo like they don't want to kill Mickey Mouse. Or, more cynically, no one really wants Nintendo and other video game behemoths to step into this fight on the other side, because going after Big Tech is hard enough as it is.