Actually I go further, I think those into art should always express that through ownership.
Books go out of print or the translation varies. Films are unavailable if they're not one of the top grossing films, and even if they are then they can be unavailable (i.e. Disney exercising artificial scarcity over historical titles).
I own and ripped over 6k CDs into FLAC a long time ago, and still a good number of these are not available on streaming services even though they were major releases in the UK in the 1990s and 2000s. Why? Because the coverage of EPs, Singles, B-sides, and some variations of albums (Japanese imports with extra tracks) isn't represented by Spotify, Google Music, Tidal, Apple, etc.
The only way to ensure you can enjoy something in the future is to own it today.
For me, music, video and book streaming / digital rental fills a different problem space - discovery before ownership.
I am always more than willing to pay for content, but what is one supposed to do when what you want is out of print and there are no viable secondary market options?
To this day, it remains one of the possessions I love most. The hunt and all the crates I dug through add a mythology that beats the actual product. The mix is really good and shows Mitch Easter at his absolute best, but the hunt is worth even more than the artistry.
That’s all a long way of saying if there aren’t any secondary market options, keep digging. You’ll eventually find it and the story will be worth more than the recording.
I'll keep digging!
Also helpful are YouTube, SoundCloud, and if you want to listen to contemporary music, things like NTS radio.
It makes me sad that young people today growing up on Spotify simply cannot find out about most of the music I grew up with, or most of the music that excites me coming out today, unless they go "off road."
Maybe it's just the genres I'm into but between youtube and soundcloud (+ a bit of bandcamp) maybe 95% of underground music new or old that I look for is available. Knowing it exists in the first place is a step of course but once you find something good both sites seem pretty good at suggesting similar tracks.
Going by my streaming history, if I owned the recordings I listened too I'd have a full CD shelf for the late Beethoven Sonatas. The same again for the Concerto's, perhaps two for the Symphonies. I've just spent £150 at IKEA just to hold the basics of Beethoven, before I've even got the CD's!
Of course the alternative is to only listen to my 'preferred' interpretations, which is the unimaginable boredom. Zimerman's ballades are too dry, Perahia's too wet, Horowitz's too unorthodox, Ashkenazy's too uneven; but I'll listen to all of them again and again and again. I'm not picking a favourite here. I'd forget Chopin before I pick one.
Finally, so what if my streaming service comes and goes? I just go somewhere else.
I find classical music even more enjoyable if you have the sheet music to follow along.