To be fair, in the quoted passage the author is explicitly not referring to Bolt, but asking for explanations of specific, probably small scope issues from non-agentic AI tools.

Personally even while in school for CS I spent a large number of hours staring at a screen being totally unsure how to proceed to figure out what I didn't understand, most of it trivial details, or making random edits and hoping it would fix something. I'm sure there are advantages to learning by stumbling around, but I really don't think it's the ideal way unless you're already a very methodically curious person.

The temptation to jump directly to asking the AI to just do everything for you without yourself understanding it is definitely going to be a stumbling block for people learning, and I'm not sure if there's a good way around that one, but otoh something available 24/7 that can mostly accurately answer beginner questions in context and as you have worded them seems like it would be crazy helpful, so many times I just wasn't able to progress until I could get some attention from someone.