I don't know why people don't value their time at all. PaaS are so cheap these days for the majority of projects, that it just is not worth it to spend your own time to manage the whole infrastructure stack.

If you're forced by regulation or if you just want to do it to learn, than yeah. But if your business is not running infra, or if your infra demands aren't crazy, then PaaS and what-have-you-flavored-cloud-container products will cost you ~1-2 work weeks of a single developer annually.