Also it's a compounding process. Having a game that's fun only when you're succeeding selects for players that like that, which creates a social component that makes it so it's only fun to succeed.

I don't find this genre fun whether I'm succeeding or not, for me it's 100% journey (casually and socially exploring the way mechanics combine into interesting gameplay - including failures as much as successes) and these games and their player base seem to be the precise opposite of that.