No comment on 3.
On 1, the point is that graphics and what you call game dev isn't really that necessary to sell or to be fun. It was in response mostly to people who for some reason think it is, especially those who think that "battlefield" or "the last of us" games are a different category of game. Idk, that sort of thinking is a big problem and part of why games have moved away from being fun and being what lead to the rise of "press f to pay respects" being a meme. Too much emphasis on very American thoughts of what makes a game good: graphics, intricacy or complexity, and too much story telling vs what actually does without fail, just being fun. The thing is making something fun is actually pretty difficult because it require ingenuity and creativity, while the others just require grinding and there is already a path forward. Again, I said this was a tangent because it is, I'm just tired of modern games just plain not being fun and being too geared towards being interactive movies with eye candy. The enabling (requiring) of 600W cards for a video game is just yet another result of this slide of the larger game dev space which is why I bring it up.
On 2, I know you're saying comparatively but really just compare to games from 10 years ago, 20 years ago. I remember talking to game developers who need to cut corners say they don't worry about handling memory for strings "that are just a few megabytes anyway" and sure may be you don't need to worry about that today but no, by an absolute scale gamedevs are neglecting things like string processing[0] whilst caring so damn much about graphics, so you can't argue that things are not more inefficient now. I get your points about 120hz 4k though, though honestly if these are the power requirements, then I'm starting to develop an opinion that 120hz might make gaming start to be an activity that is bad for other reasons, particularly climate change as is argued in other threads in this comment section.
Anyway, the general reason for this rant is again, AAA game devs are approaching a similar state like the js community, whereas instead of being caught in a cycle of churning frameworks, they're caught in an arms race to try to make things bigger and more "realistic" and eventually more resource consuming whilst getting their lunch being eaten by (relatively, in AAA's eyes) garbage looking things like fortnite, animal crossing, undertale, with vastly lower budgets. I want them to realize these massively successful games which aren't in the vein of what you think of being AAA diffuses the fog and makes studios which have gobs of money realize what actually makes games good and thus which will actually make them sell.
[0] https://nee.lv/2021/02/28/How-I-cut-GTA-Online-loading-times...
[1] https://www.reddit.com/r/Undertale/comments/4auo3n/putting_u...