The thing is, the magic robot's output can be wrong in very surprising/misleading/superficially-convincing ways. For instance, see the article we are commenting on; you're unlikely to find _completely imaginary court cases to cite_ by googling (and in that particular case you're likely using a specialist search engine where the data _is_ somewhat dependable, anyway).
_Everything_ that the magic robot spits out needs to be fact checked. At which point, well, really, why bother? Most people who depend upon the magic robot are, of course, not fact checking, because that would usually be slower than just doing the job properly from the start.
You also see people using magic robot output for things that you _couldn't_ Google for. I recently saw, on a financial forum, someone asking about ETFs vs investment trusts vs individual stocks with a specific example of how much they wanted to invest (the context is that ETFs are taxed weirdly in Ireland; they're allowed accumulate dividends without taxation, but as compensation they're subject to a special gains tax which is higher than normal CGT, and that tax is assessed as if you had sold and re-bought every eight years, even if you haven't). Someone posted a ChatGPT case study of their example (without disclosing, tsk; they owned up to it when people pointed out that it was totally wrong).
ChatGPT, in its infinite wisdom, provided what looked like a detailed comparison with worked examples... only the timescale for the individual stocks was 20 years, the ETFs 8 years (also it screwed up some of the calculations and got the marginal income tax rate a few points wrong). It _looked_ like something that someone had put some work into, if you weren't attuned to that characteristic awful LLM writing style, but it made a mistake that it's hard to imagine a human ever making. Unless you worked through it yourself, you'd come out of it thinking that individual stocks were clearly a _way_ better option; the truth is considerably less clear.