The missing key factor is that you have to find something unpopular and easy which will actually have a payoff if you become an expert. Risky and easier said than done.
If you read a few books on mathematics you think you're easily going to become one of the top mathematicians? Many ambitious people try to study math and decades later are disappointed by how they are still mediocre in their field or simply fail to make it into an academic career. Many PhDs in general, actually.
Similar to the lindy effect[0] where shows that had been around a while were likely to stay around a while longer. The are the games good enough for people to host fan servers and make mods, and behind each good game there is a lot of forgotten stuff that didn't inspire anyone to preserve it.
[0] https://en.wikipedia.org/wiki/Lindy_effect#:~:text=The%20Lin...
It's no different than all other fields. Planned obsolescence is a real thing and has lead to the collapse in quality for everything. Games are also designed by C-suite and committees to target some juicy statistical player-base. Because it's all about profit, not art or quality. It's not a small team trying to make something they think is fun anymore. It's a type of enshittification.
Indie games are a shining ray of hope of course that the culture can change.
Just today there was a new article that shows this:
>That devotion to their chosen genre, in EA's eyes, meant that "you didn't have to worry" about the nerds. "You didn't have to try and appeal to them. You had to worry about the people who weren't in the cave, which was the audience we actually wanted, which was much larger."
https://www.gamesradar.com/games/dragon-age/dragon-age-maest...