There's different ways to use it. If you use it to cheat, yeah, your ability to think will be destroyed because you aren't learning.
It might be more useful if used to explain concepts, so you can do the actual work yourself. I know there's a lot about math that I didn't really learn in class and had to learn from extra lectures I watched outside class in my personal study time, so if someone used it like that it might help. Personally, I'd be too anxious about hallucinations teaching me bad information. The last thing I'd want is to end up like that guy who thought he was inventing new types of math because his chatbot told him he's a genius.