My hunch is that people who use the process you are describing will still get a massive leg-up in learning skills like web development.
Often it isn’t a choice between using AI-assistance to get some working vs spending 20 hours figuring it out from scratch: it’s a choice between getting somewhere with AI or not doing the project at all, because life is full of things to do that are more rewarding than those 20 hours of frustration.
Anecdotally, I’ve heard from a bunch of people who always wanted to learn software development skills but were put off by the steep initial learning curve before you see any concrete progress… and who are now building useful things and getting curious about learning more.