Why is this a bad thing? Assume one guy in my team does ALTER SYSTEM on a cloud managed DB. Next month he leaves, later someone redeploys the DB, nothing works

Why is this a bad thing? Assume one guy in my team does ALTER SYSTEM on a cloud managed DB. Next month he leaves, later someone redeploys the DB, nothing works and nobody knows why. Declarative config and IaC has become standard operations to solve real world problems. Besides that, if I wanted to operate the system internals of a DB myself I wouldn’t be using a cloud-hosted version in the first place. I pay them precisely to manage all these details so I don’t have to think about it. If I don’t want that there are a lot cheaper alternatives.