With that take, the internet was what seeded our destruction. Doctors could get credible-sounding bad advice on the internet a decade ago, no AI needed. This is just another "don't trust everything you read in Wikipedia" moment, and it will pass.
I choose to be naively optimistic: the glut of reasonable-sounding bullshit will increase the practice of citing sources when making claims. Then we can go back to good-old-fashioned lying with statistics.