That’s partilly more on the people creating duplicates without looking if the community doesn’t exist already

Which is not bad; actually and to the contrary, it can be a part of each instance’s cultural identity and it’s a practical way of ensuring the diversity and viability of smaller instances.

Discussing c/soccer in an Argentinian lemmy can be very different than discussing it in hexbear, for example. Not to mention it’s likely most of everyone would’t even be able to participate in hexbear’s. Furthermore, general subjects becoming tied to the largest instances, which statistically have more surface to cover the creation of communities for any subject ever, returns us to the same problem of conversation and community becoming centralized into a “Reddit” instance.