You're expecting the vast majority of users for the deskilling machine to somehow want to learn a complicated subject then practice to get better at the subject by talking intricate classes and dedicating substantial amount of hours to learn how to better communicate with the deskilling machine?
Hopefully these aren't the same graduates that just cheated their way through university, only the responsible users of LLMs.
I don't think we can use the climate of today as indication of what comes tomorrow. Too much is in flux, we are experiencing growing pains. Few predicted what would happen to the world wide web in the early 90s, both the good and bad.
Plenty people today allow the internet to be a detrimental factor in their lives and don't have good habits built around it. The same will be true of AI.
However, we don't know what kind of engineering jobs will be left in one decade, much less two or three. Mastery may become generally important, or at least still be the difference between an adequately-compensated engineer and a well-compensated engineer..