Why should it be? In my experience it depends on the case, and in my case it seems like an absolute technological overkill to version the site and have statichost regularly pull from some repository, as I update it perhaps once a year.
I'm a programmer by trade and do plenty of versioning via _v1 and so on when working on music with others, we basically send .zip files over Telegram and append some label at the end. Not gonna ask these people to learn something when basic "have many copies" does the trick sufficiently good.