Just because your VM is running doesn't mean the service is accessible. Whenever there's a large AWS outage it's usually not because the servers turned off. It also doesn't guarantee that your backups are working properly.

If you have a server where everything is on the server, the server being on means everything is online... There is not a lot of complexity going on inside a single server infrastructure.

I mean just because you have backups does not mean you can restore them ;-)

We do test backup restoration automatically and also on a quarterly basis manually, but so you should do with AWS.

Otherwise how do you know you can restore system a without impact other dependency, d and c