You surely can play games on anything, but question is what titles are available on a thing.You an do all that, but it doesn't really make it a "console" like people on here keep asking for. They are looking for PS5 and Switch -level games from big studios, and have asked for such.
I can play silly little games on Netflix and Roku too.
ATV, by virtue of being so very close to iOS devices, gets the bulk of iOS titles. Put in other words, ATV gets the bulk of the titles released on a viable games market, without being a "game console" since no "AAA titles". It's a middle ground of a gaming device. Something that netflix/roku are not.