AI use for defamatory purposes, such as deepfake porn mentioned in another post here, applies whether one is a a massive celebrity or a regular person. As the technology becomes more common, don't you think there will be people using it on their school and work colleagues and neighbors, for a variety of petty reasons?
You talk about how horrible it would be for people to sell their likeness, without considering that without such laws and protections they can just have their likeness taken with no consent or compensation.
I am seeing a lot of grandstanding of how these laws are just the powerful taking rights away from the common man, but it seems to be exclusively from the angle of how that affects the AI user, not the regular people whose likenesses might get used by AI.
To be fair here's good reason to be careful over how this matter is legislated, as media companies love to use any excuse for overreach. But the solution is not leaving the internet a wild west of people smearing each other by faking videos.
Consider that the advent of the camera created a need for many laws, because before then even the most realistic image was known to be fabricated rather than a replica of reality. Now AI and other new media technologies are creating possibilities which we never had before, for which our previous laws are insufficient.