The alternative is whatever one can learn without GPT-4 in whatever amount of time is reasonable/allocated for it at the moment.
Like, take Docker. Yes, you would not be wrong to say that "by getting help from GPT-4 to do stuff, you won't learn it as well as people who didn't get that help and slogged through it over the course of 2 years at one of their last job", but this ignores that I probably will, over the course of the next several months, learn a lot about Docker in a fraction of the time it took the hypothetical other person.
I don't doubt that leaning too much on LLMs as a crutch may have negative effects, but I find this to be a surprising line of argument on a tech forum; there is such an obvious difference in efficiency between learning using an LLM versus the slog of other materials--again, aside from books, though I think they offer, ideally, a different kind of learning.