I'm not sure, tbh. I'm feeling pretty doomy about Lemmy lately.
I've been involved in actively trying to build up an existing Community: I posted stuff, people saw it on All, and subscribed. From that point, growth should be exponential - if you get an extra 100 subscribers, at least 1 of them should be able to overcome their crippling insecurity and post something, but in reality, nothing happened. I kept posting, but repeated mining of my own sense of what's funny just revealed how far adrift my own sense of humour is from a universal sense, and that was that.
You can do what you like to try to grow a Community, but if the people you bring in are the same type of Entitled Toilet Browsers you already have, it won't mean much.