You say Helm literally does this. But what the grandparent was asking for wasn't just backups. They suggest (as I see it) an open standard for backups, ubiquitously implemented so it's easy to switch your provider and easy to set up new devices.

Does Helm use one of those? I suspect not, because I don't know of any such ubiquitously implemented open standard for automatic encrypted backups.

So: is Helm going to put in the effort to define such an open standard and push for it to become ubiquitous?

Even if Helm implements automatic encrypted backups, it's still contributing to a fragmented world siloed into incompatible apps and platforms. Making your siloed service better than others won't fix that problem.