I'm kind of curious though - what can you do as a non-technical user to prevent this? Let's say you're on shared hosting - you don't know what object storage is, and you upload your PHP themes via FTP (or at best, FTP+implicit SSL, but the default is plaintext).
Your backup is probably downloading something over FTP, or creating a backup in cPanel/DirectAdmin/whatever shared hosting panel.
Your host doesn't allow SSH. This is the hypermajority of shared hosting.
(My apologies, I didn't mean that directed toward you, it was more of a general "this is HN, not everybody will self host GPG backups on immutable redundant cloud storage")