You should be able to avoid getting flagged if you encrypt your files with something like cryptomator.

can’t easily d/l mp3s from youtube music

You can with yt-dlp and any of the GUI frontends based on it. I suggest these:

• Linux/WSL: Parabolic
• Android: Seal

(Anyone who knows any, feel free to suggest more)

Exactly, well if anything, I guess the claim is technically correct, which in this case may not be the best kind of correct

I think so, also wasn’t quantum computing a real threat for asymmetrical encryption only?
Some info over here