Completely agree - I set up some communities on .world and have spoken to others who did the same.
I reached out to the owner of Dungeon World here to discuss what we should do, and we are going to figure that out - the community here is far more active so it may be a case of repointing or keep both etc who knows. All very nice conversation, nothing rude just people trying to figure things out together!
The kind of behaviour being seen where people are being asked to move here is what happened with Android and left a bad taste in a lot of people's mouths as it was a large existing community shut down by one person. It also can't be good for the community as a whole if people are rude, harassing, etc and that kind of behaviour will make people go elsewhere and rightly so. I don't understand why people are like that.
There are issues with having duplicate communities as well as benefits, but being a dick about it isn't a great look.
The TTRPG community on Reddit could be pretty hostile and rude, I was hoping here it could be different! My own experience has been okay - first impressions from some other people hasn't been great.