For reference, I use FLAC instead of MP3. Your collection may be larger, but my ~12,000 FLAC files take less than 500GB. So I'd say it's a question of value: You could have redundant copies of your music for ~$300 CAD with a pair of Samsung T5 SSDs, or you could someday lose every email, contact, photo, document, Youtube playlist, and MP3 you use Google for.

I'm not saying it's likely, but it only has to be a one-in-100-million chance for it to hit a couple Google users.