B. The law makes no distinction between a game console and a computing platform, nor should it. There is also no such thing legally as a “general purpose computer” like I’ve seen some people try to define iPads as, so as to somehow justify iPad sideloading but not Switch sideloading.
C. I don’t buy the 30% cut argument, because we have a counter example: Steam on PC. How many companies sell their games directly outside of Steam? How many give you a 25% discount on top of that? Nobody.