Right up until the sellers of dental supplies find a way to...
Indirectly influence model training to increase the frequency with which models recommend dental work and/or lower the bar for what they determine to be "necessary"...
or...
Directly influence model recommendations by paying model providers (who will be happy to take that money).
The point being that models (and particularly the humans that control them) are presumably just as corruptible as the humans they are replacing.
When I was thinking of the examples I gave (poison the training and/or pay the providers), I was intentionally drawing analogs to how I saw Google search decline.
First, SEO "experts" poisoned the results. Then Google saw how much money could be made, and they sold the ad space directly to marketers. If you search for "Best <widget> for <doing something>" on Google, I am certain you are not getting the "correct" answer. And Google has suffered no consequences for this. To the contrary: it has been extremely lucrative.