Git is decentralized. Ticketing systems and mailing lists as found on SourceHut and many other forges aren’t.
And if SourceHut disappears, what would you do with the repository? You’d upload it to a new forge, but how would you tell users where to find it, how would the users know this is the original source and not a hostile fork? It’s better to pick a stable, trustworthy. and 21st-century place like GitHub or GitLab instead of SourceHut.