The r/flying subreddit is moderated to be for pilots to discuss actual participation in flying and flight training subjects, moreso than any airplane themed content. At the moment the content being posted here is more similar to r/aviation. It seems to take a significant community and moderator effort to keep out general aviation themed and even general travel-themed posts, but the result has been a high quality pilot (and future pilot) community. What’s the intention here?
Sounds like someone needs to make /c/pilot. There no need for Lemmy communities to be a 1:1 map to subreddits.
Certainly there isn’t, but if your goal is to build communities, making it easy for existing high-quality ones to transplant themselves to the fediverse is probably a good strategy.