This doesn't just apply to software development - it applies across the board in any form of knowledge.

An example would be economics - an LLM can spit out a bunch of words about an economic model. But if you don't take the time to learn, visualise and understand it for yourself - it means nothing to you. And in that case, if you already possess mastery why would you waste your resources playing around with an inferior tool to you?

You wouldn't.