Except that all those IAAS solutions must be setup / manage by ops / devops, regular dev have no clue about architecture, infrastructure as code, security, back

Except that all those IAAS solutions must be setup / manage by ops / devops, regular dev have no clue about architecture, infrastructure as code, security, backup, alerting, best practices ect ... I have yet to see a dev with good ops skills. DevOps are not dev that moved into ops world it's quite the opposite. It's Ops people that moved into dev teams. The other thing is also that dev usually don't want to do that, and when you force a dev to do ops things it gets very dangerous.