The situation I'm thinking of is one where Meta creates Threads (or whatever it will be called), and then a bunch of people defederate. In that scenario, there will of course be big servers who choose to federate with Threads. Given Meta's reach and influence, they will undoubtedly have one of the bigger instances, so a lot of politicians, journalists and everyday people will go there.
Making it so people can't see that content will just make the fediverse become more centralized, because people will just go to the bigger instances that will allow for them to see that content, or just go sign up for threads. I think that's bad because it creates further centralization, even if they're providing the content that people want.
Even though I know a lot of people disagree, we need all types of content in order for this place to grow. I'm not talking about any far-right nonsense, but even garbage like tabloid fodder and stupid meme bullshit will keep our networks alive and users engaging. The easier it is for the average person to use the better. If the point is not profit, then it must be to allow people to come together and talk about almost whatever with almost whoever, and wherever.