I think a lot of this is not about security or service level. It's psychological, it's about control/trust. When it's under your control and you can fix thing

I think a lot of this is not about security or service level. It's psychological, it's about control/trust. When it's under your control and you can fix things yourself, you psychologically feel more safe. If you rely on someone else and they say "we're working on it" but don't give you an estimate, you feel a lack of control. It may be that doing things yourself has worse uptime/performance/etc than relying on someone else, but the psychological effect of that loss of control when something bad happens is huge.