You just happened to get a reply from a former backup engineer who has had to explain this concept to customers.
Something else in the backup world that gets regularly misused: backups != disaster ecovery.
Disaster recovery is a whole plan of action. Backups can be a part of DR, yes, but I have had way too many companies consider their backups as the totality of their DR.
I know of several very large companies that still use tape backups. Granted they’re not like the cassette tapes we used back in the 20th century, but it is still the same tech.
Those tape libraries are more akin to zip/jaz drives.