If you want to start a new community on Bastyon or Brighteon.io, go right ahead. There are other communities on reddit, matrix, Simplex, and individual posts on nostr. People gravitate towards the community that have other non-Monero accounts that suit their interests. IMO, if monero.town is defederated, people who use monero.town on lemmy are more likely to either return to reddit or move to matrix or nostr or simplex rather than try yet another new platform, but if you do succeed in getting people to join, I’ll happily at least look in on it to see what else the platform has to offer.