I am also thinking, what is the target group of all these courses? I am 1300-ish player and I think I am far below the rating when most of the opening courses start to be relevant. But on chess.com I am on 95th percentile.
Is the huge load of courses on various platforms targeted on like 3% of chess players?
Hi, I wonder if someone does the same as me.
I see some video with some interesting opening, go to chessable (or any other courses platform) and find a course suitable for my rating (or higher, because I see myself as a master after finishig the course), read info and say "that's a perfect course of an interesting opening, I will study it thoroughly, become an expert in it and destroy all my opponents."
Then I buy it (ideally with some expensive 20-hour video) and start studying - and during the first chapters I am like "why would opponent play this particular move? what if he plays something else? this variation will never occur on my board, I don't even remember first five moves"
and after studing 10% of the course give it up thinking that I will rather study middle game or endgames.
And after some time the same situation happens again with different opening course...