> Since good LLMs with reasoning are here

I disagree. I get egregious mistakes often from them.

> because I'm able to always get an explanation

Reading an explanation may feel like learning, but I doubt it. It is the effort of going from problem/doubt to constructing a solution - and the explanation is a mere description of the solution - that is learning. Knowing words to that effect is not exactly learning. It is an emulation of learning, a simulacrum. And that would be bad enough if we could trust LLMs to produce sound explanations every time.

So not only getting the explanation is a surrogate of learning something, you also risk internalizing spurious explanations.