Several points to make here.

1. The specific point about streaming being a viable way for budding musicians to get their work seen, is fair. As a novelist, I make both physical and digital copies available, so I recognise there is a market for both, regardless of my preferences, which I'll come to in a moment.

2. My approach to digital copies of anything is to treat it as a servant rather than a master. If I own a physical copy of a CD, I have no issue digitising it for more portable use in an iPod or whatever. For one thing, I like to make my own annual best-of-the-year singles compilations, and have done since the 1980s. What used to be a 90 minute annual cassette became an annual CD and is now an annual playlist. But these are all backed by hard copies of the music I buy. On the rare occasion I do buy a copy of a song on iTunes, I burn it to disk immediately and there is my hard copy. I don't do Spotify, and I never will, because I don't "own" anything there.

3. To the point about ownership, here's why I'm a staunch physical copies only neo-Luddite (hey, if you want to call me that, I'll wear it with pride): I don't trust something as important as art to the curating whims of whatever corporate interests run the streaming platforms. That goes for books, films, and television as well as music. The threat of censorship and control is real. For a full response on this point, check out this article of mine: https://fanfare.pub/own-nothing-and-be-happy-no-thanks-d7298e51f594