I recently watched a mid-level engineer use AI to summarize some our code, and he had it put together a big document describing all the various methods in a file, what they're used for, and so forth. It looked to me like a huge waste of time, as the code itself was already very readable (I say this as someone who recently joined the project), and the "documentation" the AI spit out wasn't that different than what you'd get just by running pydoc.
He took a couple days doing this, which was shocking to me. Such a waste of time that would have been better spent reading the code and improving any missing documentation - and most importantly asking teammates about necessary context that couldn't just be inferred from the code.