[toomuchtodo]

This is a poor analogy. Does a developer need to understand some infra fundamentals in order to properly architect applications? Absolutely. Should they need as much experience as a devops of infra engineer? Absolutely not. That's just shoveling more work and expectations on someone to squeeze more value for the same dollars out of them.

There are only so many productive hours in the day. You can not be an expert in everything, there simply isn't enough time.