Where should communities live?

If my home instance is lemmy.ca, and I want to create and moderate a community about, say, Japanese woodworking (random example of a subreddit I follow), isn't it a bit odd for that community to be hosted by lemmy.ca? If somebody else later created a community of the same name on lemmy.ml or lemmy.jp, would people be more likely to join those communities as they seem more "official"?

On one hand, joining multiple instances just for "better" vanity URLs for new communities seems wrong (and annoying to manage), on the other hand it's odd that I'd arbitrarily impose the traffic associated with a community completely unrelated to Canada onto lemmy.ca. How is this supposed to work?