AWS doesn't get magically expensive just because you put your website there.
You don't get to an overcomplicated AWS madness without having a few engineers already pushing complexity.
And an overcomplicated setup also means it needs maintenance. There are no personnel savings there.
For one VM, EBS with backups gives you business continuity.
You could get manual failover with a single writer replicated managed Postgres setup and a warm VM.
That’s on the order of a thousand a month for a medium workload. It’s probably a 10x markup vs buying the servers, but it doesn’t matter if it saves an employee.
It doesn’t save employees. Over-complicated infrastructure doesn’t magically appear out of nowhere. Someone has to setup and maintain. It’s expensive.