What do you mean by "these types of services"?
E.g. I've worked in a business who self-host their Gitlab instance, there was a non-negligible amount of work for backups/upgrades on top of troubleshooting performance issues once in a while, amongst other things in the same vein.
Granted, self-hosting comes with it's own share of problems too, no solution is a silver-bullet without any issues, but being able to "freeze" things to a stable mode helps to stabilize other processes.
Most people don't want any responsibility though so they do everything they can to push work off to a SaaS or cloud provider. That way when the SHTF they can browse reddit and point their boss to the status page.
Phew, those are a lot of assumptions. Many businesses choose cloud services cause they take the tradeoff between that cost or having someone at hand to maintain the infrastructure, depending on its complexity. I've worked with employers using many cloud providers for years now, the amount of times I would _legitimately_ be prevented from working at all by outages is extremely low.
The agency part, I do get. But come on.
However, I'd still argue that choosing when downtime can happen is important when you're pushing out larger changes to larger organizations. You don't want to be in the middle of a borked migration when your CI/CD service craps out and you can't rollback/push more updates or even restore backups as it was all automated via your CI/CD service.