

Because that’s where all contributors are.
Personally I’ve been moving towards dual hosting everything on GitHub + Codeberg. It’s pretty easy to setup CI to keep them in sync, and I’m open to dealing with the annoyances of managing multiple issue trackers.
130ms is perceivable but still quite small, and you’d only hit it once per domain (per TTL). If you care enough to intentionally use it then I wouldn’t worry about it. You’ll rarely notice the difference.
There are a few other services with similar ethos that you may want to check out as alternatives. Quad9 is the one I remember off the top of my head.