Inefficient credentialism is a different problem from lack of opportunity to grow your skills though, which was the original contention I replied to. IME companies are perfectly happy for their employees to spend deliberate time learning how to be better at their job, and this is actually usually even formalized as a written expectation.
The explosion of stacks means it’s hard to keep everything in your head at once. Lookup is routine but will sink you as a candidate.
Personally not great under the gun in adversarial interviews, so my extensive self learning is not well highlighted.