Perhaps if you’re building upon 15 years of knowledge and have good judgement about what to believe they could potentially be decent for self-learning, but i don’t see how that would be any easier than just doing self-teaching the old fashioned way.
If someone is starting with 0 years of knowledge, I seriously doubt an LLM would be beneficial in any way.
There are studies about the phenomenon of people not learning as much when acquiring the information becomes too frictionless (i.e. “what’s the point of knowing something when I could just ask the computer”).
I am adept at self-learning, and I would never utilize such a tool in my studies. I also don’t see any need to augment my self-teaching process, as it is already extremely easy, and I am already good at it; I don’t need assistance from software that is incapable of thought (critical or otherwise), and doesn’t “know” anything.