In itself, I'm not sure this is a great argument. Putting shoes on a horse is an act of learning. Butchering your own pig is an act of learning. Sewing your own clothes is an act of learning. Writing your own operating system is an act of learning... but if you don't do any of that, you're not necessarily worse off. Maybe you just have more time to learn other things.

Maybe there's a broader critique of LLMs in here: if you outsource most of your intellectual activity to an LLM, what else is left? But I don't think this is the argument the author is making.