That's because of using the IPR's for market/platform/eyeballs/etc.-gatekeeping is more lucrative. Such behavior is illegal in any other market, but in media it's not for "unknown" reasons.

Completely agree. As much as I dislike modern streaming services' habit of preventing you from owning the art, I have to credit them for breaking me out of my deep rut and getting me to discover new artists. For decades I didn't know what I was missing.