That’s not how the content addiction works. The social element is a key part of it—the chaotic nature of the pre-chewed content you so willingly and enthusiastically chow down is precisely what makes it addictive.
It remains to be seen how much of that social element is taken over by LLMs as well. There's already plenty of stories about people retreating into LLMs. Whatever shape and form this all ends up, we're just at the beginning, and the only limit will be how economically and socially sustainable it is (chances are: it's not).
They are unpredictable, yes, but the social element of said chaos is missing and will never be able to replicated by an autocorrect on steroids. AI just will not replace social media.