I think the argument is Apple has a little more market dominance (both smart phone hardware and OS) than a single smart tv maker or even Nintendo in the console market.
Keeping the market dominance point in mind, Apple isn’t just deciding what is and isn’t allowed...you had a number of developers with successful apps not just have to contend with a copy cat app created by Apple but because of their control over the marketplace Apple killed their developers apps and took the entire market (rightly or wrongly).
So yeah if you change your facts and the smart tv or Nintendo allowed apps/adult games, saw developers create a market and then the hardware maker launched their own software competitors and disallowed the initial apps/games...there would be blowback.