Inevitably, it fails frequently at both. Any "reasoning" it is doing is merely rehashing ideas that someone else has already posited. This helps some of the times, but the vast majority of the time it just chooses a biased perspective (frequently the most common) and then regurgitates tired old talking points. This contrasts greatly to speaking with others who often have more intuitive notions that tend to be less polished and rote.
I'd love for LLMs to be better sounding boards, but so far they fail miserably far too often for my tastes. To each their own though.
I find it to be a really tight loop and results in very high quality code at a high velocity.
Yes, but eventually the intellectual whack-a-mole gets tiresome unless you get really, really good at simultaneously cornering it and not letting it concede to your point.
The point is not to literally win an argument (it doesn't matter), it is to use the model like a partner to poke holes in your own understanding. Once it's poked a hole, it has served its purpose. Plus, you eventually run out of context or the model trails off into babbble.