Sure anyone can put their music out there now, and that is great, more so on platforms like Bandcamp though rather than YT - YT still has the same mechanisms of old, push the mass appeal stuff and bury anything interesting/too different in (relative) obscurity, because ad revenue. IMHO.
To the first point would you have bought their music had it not been on youtube and you had heard it elsewhere? If so then YT is irrelevant in that decision, if not then you bought it for reasons other than simply liking it, presumably because you like their tutorials or whatever. To the second point there are scenes everywhere, like this forum and other forums, YT isn’t the monopoly on supporting a scene you like or participating in a community.
Please know I am not criticising your decisions, but just saying about how I make mine, specifically the part about perspective as a consumer of music, I don’t actively avoid synth youtuber music, but it is not generally my cup of tea.
I wondered if someone was going to scoff at that. I can see their perspective about the community vibe though.
