Or to put it another way, my dentist, a professional, with a vested interest in a yes answer, tells me that the answer to the question 'Is a dental hygienist worth spending money on?' is yes.
Google AI, specifically briefed not to 'scrape the websites below' but to use only authoritative sources that don't stand to make money out of a yes answer, concludes there's bugger all evidence that it does any good at all, and such sources, the NHS, say, say that such procedures should be based 'entirely on clinical need'. Which would be indicated by tartar build-up, which I don't have, or gum disease, which I don't have.
So, you run along and get your teeth sparkly clean, as per your 'professional', and I'll continue to engage with AI, because I think it can be helpful, as long as you don't just take everything it says at face value, and I think there's a more interesting disussion to be had than 'AI: it's bad, n'kay?' Or possibly, given recent evidence, not.