There's just not the critical mass of knowledgeable users for professions outside of programming on any Lemmy instance, from what I can tell.
I kept my reddit account for the lawyers subreddit and some of the others around the practice of law, because I like the community of people who are in the same career as I am. I also tried esq.social (mastodon, matrix, and Lemmy instance for lawyers), but basically only the matrix server gets anything close to a critical mass of user engagement.
I'm considering creating a new reddit account for sports discussion, too, because there just isn't anything like the NBA subreddit.