I kind of get where you’re coming from, but to me it sounds like you’re looking for a different experience than what Lemmy is designed for. It seems you are more interested in aggergating all posts about specific topics (like “books”), and strongly limiting the effect of moderation (as nobody would have final say about how to moderate an entire topic). If I correctly understood the experience you’re interested in, then for sure the design of Lemmy will not match that.

I don’t think it’s fair to describe this as a fatal flaw, though. Lemmy is not built around the idea of generic, “ownerless” topics, instead, it’s built around communities with clear owners. We have decentralization at the admin and infrastructure level (as in, a single admin does not control the entire network), but this does not really mean we also need to have it at individual community level.

IMO it’s totally fine that different people create different communities with extremely similar purposes. The entire internet as a whole also works like this - the internet itself is decentralized, but at the same time people can create different websites with very similar purposes (and even domains!), and it works out fine. For example, it’s totally possible for there to exist a news.com, news.co.uk, news.ee, news.fi, etc. Imagine if whenever you navigated to news.fi with your browser, it would also automatically insert content from all the other news websites of all possible domains - it doesn’t really seem like a useful feature, but that’s kind of analogous to what you’re suggesting for Lemmy at the moment.