The subreddits I moderate are all quite small (about 2-5k subscribers) and on relatively obscure topics. For now the Lemmy communities I've started are on pretty broad, general topics. I'll consider official moves for them if the Lemmy userbase gets big enough or if Reddit really does die.
Paging from kbin, but this should apply for Lemmy as well.
Vulcan is still moderating a country subreddit (due to the traffic) but in a reduced priority, but keep the smaller niche subreddits (that mainly moderated alone) in the private.
Forgive my comment for being a bit... crass.
Lemmy & the Federation are emerging technologies.
Early tech adopters are never "average people", they are disproportionately geeky 18-to-35 year old middle-class white males with spare time to tinker around. Or basically... me.
It's less likely they are ethnic, religious and sexual minorities, disabled individuals, elderly, women and/or other disadvantaged groups. So Lemmy is at a demographic disadvantage right now.
It took a very, very long time for the "average person" to accept Reddit as an accessible & safe online platform for anyone that doesn't fit the 'early adopter' archetype. Heck, I still know folks that think of Reddit as a sort-of 'radical' space where Hackers cosplayers use tech-jargon to communicate all day. And it wasn't that long ago where this was more true than lies.
In any case, there's a reason why Lemmy's most popular communities are things like Technology, Gaming, Linux, Piracy. There's waaaaay less human-interest stuff. Way less stuff that appeals broadly.
An example:
Do you know how many subscribers there are in /c/relationship_advice right now ? There are four. There are zero posts.
Meanwhile, r/relationship_advice has over 9 million. And it's pretty close to 1:1 ratio for men and women contributors.
Over on Reddit, I help mod a regional community of 65K subscribers. It's a casual place with casual people. People hop in asking for tourism advice, recommendations for school districts, questions about traffic or local quirks, etc. These people aren't always tech-literate.
So the thing that prevents me from moving my community off Reddit is... they're not ready for it yet. I suspect a lot of mods feel the same.
In the meantime - we can focus on making Lemmy into the best space it can be for when those users are ready. We have meaningful dialogue, we respect our differences, we keep the place clear of ads & spam, and clear of bigotry.
Once there are high quality, extremely simple apps that allow everyday users to browse Lemmy without having to explain any advanced tech jargon, I'm hopeful the Federation will take off. The demographics here will shift, and with that - communities will be more eager to move over. We might see things like "Hi Lemmy, I'm an old Korean War survivor. AMA!" instead of "Plex is giving me an unsupported codec notification, did I download the wrong DLLs?".
Hope that rambling made sense.
A first step in removing bigotry is perhaps to let go of the stereotypes. There are a lot in your post.... None of which you can back up with hard data. It may be hard for you to sympathize with, but always getting confronted with the supposed "fact" that you are the odd one out when you are not male, white, middle-class, does not exactly make for a welcoming stance.
The same goes for stereotypes about who is interested in what kind of topics (supposedly). It doesn't help anyone to repeat these stereotypes again and again. But it's offputting for people who get put into boxes like that.
Have some faith in people who do not fit your archetype or you. They are more capable than you think. When we would all stop to basically tell them "No don't try, this is too complicated to you and you are interested in other stuff anyway!" that would help a lot.