At least 50% of the bands I’ve seen, toured with, or heard don’t record music to make money. There’s just too much music for it to be dependable income. They do it because they wanna share something neat with their friends. They upload it to sites like Spotify or a decade ago MySpace or a decade before that zines so other people can find cool shit. If they get lucky, that stumble upon nets a shirt sale which actually nets the band some income.
The sweeping generalizations you’re making do not apply. Stop trying to make music about money.
Edit: mailing tapes was a thing a few decades ago. Are you saying I ripped off those folks because I wanted friends on one coast to hear shit friends on the other coast recorded? That’s a really fucking hard DIY tour to build. You’re fucking Skinner saying all us kids are wrong.