I think this is pretty dubious. It's true that you have to do more proactive learning with an agentic workflow, but it doesn't mean you can't learn stuff. Software engineers forged in the age of AI are not learning the same things their predecessors did or thinking about code in the same way, but the more curious people will still be better at the job, which is I think how it's always been. It seems a little unclear how much "AI brain rot" will be a force unto itself that neuters even the smartest of the juniors, but I think it's still an open question.