I think that we just don't fully understand everything it gives us yet.
The complaints of "well it explained this wrong" are over-emphasized. The same thing happens with google and with any sort of research. Besides, if you're actually being productive with GPT4, you're going to be asking it stuff that relates to something you do know, and will be able to verify it readily enough. (Especially when it comes to programming and compilers.)
And just a reminder, those of you opining based off your experience with GPT3.5... GPT4 is a huge, huge improvement. Almost to the point of it not really being an incremental improvement. It's so much better it's like a different thing.