There's a flaw in your logic around people's preferences if Lemmy wants to keep growing - at the end of the day, Lemmy is a service, and people shouldn't be expected to give up what they want from a service. They'll just go somewhere else if they aren't getting the services they want.

It's like if a restaurant told you what they were going to serve you and you better eat it or go find somewhere else to eat. Nobody's going to put up with that. They'll go somewhere else to eat. Just because you think the food is good doesn't make that a good service model.

Now, I'm not saying that Lemmy should copy Reddit, or Facebook, or whatever else because that would defeat the entire point of Lemmy. But, taking into consideration the friction points people have with using federated platforms and coming up with ways to reduce that friction will only end up helping everybody. For example, finding a way to make a native aggregator for similar communities across multiple instances would not only help with discoverability for smaller communities, but would increase engagement by simplifying the process of users being able to find content they're looking for while also allowing for more instances of those communities to exist across more servers without splitting or isolating the userbase to those servers, which would increase the resilience of Lemmy's communities to specific servers going down.