You misunderstand the social layer.
Social layer is like comments under YouTube channels or newspaper articles, recipe or movie ratings, developer discussions about code-change proposals, websites that allow you to book hotels and complain publicly about the dirty bathrooms or post pics of the delicious breakfast buffet, chatting during a video conference or while watching someone stream, contacting a restaurant to make a reservation, etc.
It's a way of letting users discuss what they're looking at or interact with the source of what they're looking at.
You still need people running hotels, filming movies, or writing well-researched articles. And Twitter is where news is often breaking, so Nostr doesn't need to do that (yet). It needs to integrate the breaking Twitter news better, so that people can discuss it here.