I mean... Yeah? Most explanations aren't great compared to a comprehensive understanding in your head, you already understand it - it would have to be extremely insightful to impress me at that point
The results vary greatly based on the prompt too - not only that, it changes based on the back and forth you've already had in the session
It's not a god, it's not a human expert, but it's always available, and it's interactive.
It doesn't give you amazing writeups, but (at least for me) it makes things click in minutes that I might need an hour or two to understand through reading up on it. I can get a short summary with key terms, ask about key terms I don't know, ask for an example in a given context, challenge the example for an explanations of how the example can be generalized, and every once in a while along the way I learn about a blind spot I never realized I had
It's like talking to a librarian - it gives you the broad strokes of a topic well, which prepares you well enough that you're ready for deeper reading to fill in the details.
It doesn't replace a teacher, a tutor, further reading, or anything else - but it's still a fantastic education tool that can make learning easier and faster