The advantage of spending a day or two of figuring something out is that is (mostly) a one-time process, after that you've learnt something you can apply later again and again. Taken to its extreme, you spend a few years learning programming when your agent can do it for you in far less time, but as this post states, this kind of work wouldn't have been possible (or at least reliable) had the author not taken the time earlier to learn programming, systems architecture, etc... themselves.
I'm not saying that AI can't help you learn something, but I think when you measure its success in time saving, learning gets unknowingly pushed to the back as a waste of time.