AI is still being developed in terms of accuracy. Even Google Assistant isn't that top notch yet.
For AI to be as accurate as possible, it needs high data accuracy which is why I believe many of the big tech companies are seeming trying to "invade" our privacy. Only when they do that, they'll be able to understand or rather, digitalize human behavior to create AI products that are accurate.
As per your post, AI generated comments that are happening now are not as accurate as it will be in the future.
Okay... so you are willing to sacrifice your privacy in order to make AI more accurate when generating comments? Let me remind you that tech giants are merging their forces when it comes to developing AI. If we let a quasi-monopoly get infinite knowledge about us, these companies will have be more incited to keep the status quo instead of pushing for innovation, which would be to ensure AI accuracy without having to violate anyone's privacy.