Like, I get the statistics, thing, because most devs use GitHub, and potential employers lurk there, so having more activity there raises your repo "page rank" and allows your GitHub follows to see that you've got active power users. If we move the issue activity off of GitHub, you lose that cred.
GitHub is a social network that is simply much much bigger than Nostr. Especially since most Nostriches are also on GitHub.
But this is not a problem only for current devs. It's the hurdle we face, getting anyone to move, so we should maybe fix it.