Except each of those companies has competition. Voat and Gab, among others, were born out of the idea that Reddit and Twitter were being unfair. And one had the ability to join one of those alternative platforms, even while still remaining a user of the original, without friction, largely because of having a neutral net. If we get ISPs offering "social media packages", what do you think the odds that Voat, Gab, or even Mastodon will be included?

If you believe that what Reddit and Twitter are doing is wrong, then why on earth would a reasonable solution be to extend the ability to do more of that to actors that one cannot reasonably avoid? I have a grand total of 1 ISP to choose from. The vast, vast majority of Americans have 1 or 2 to choose from. If NN is revoked, and Cox (my ISP) decides they're going to act like Twitter, then I have exactly no recourse. Why do you believe that is the way to go?