You're asking questions but not hearing the answers.
The ecosystem is decentralized in how it appears. Artists aren't just "here" or "there". Theres a ton of artists with npubs on nostr and theres a ton of artists self hosting their media on RSS feeds. My nostr feed is almost entirely music related and (finger in the air) 75% artists.
RSS is built such that if someone is "on fountain" it's because they published an RSS feed. If they did that theyre also on v4vmusic.com podcastguru podverse etc etc.
The ONLY exception to that currently is wavlake and thats due to early technical limitations. Pls realize that the person who runs wavlake has several other massive undertakings (including currently touring). If you feel something is missing, build it yourself - thats what he did and hes a musician too, not a dev.
Nostr and all the apps are a social layer. Nostr doesnt have music because it doesnt really exist outside of maybe what karnage had vibe coded the other day. But even that uses rss to a degree in believe. Nostr is not a good use case for music hosting. You guys sound like the "put it on a blockchain" people. Nostr, however is amazing as an identity and social layer. RSS is FAR better suited for metadata. And file hosting is agnostic whether you're using rss or nostr. (Still not even sure what people really mean by nostr music other than repeating a great sounding buzzword)