Yes, but you may work with other people, other organizations, or at least depend on open source code that's hosted on GitHub.

I agree with the sentiment though.

I found this hilariously confusing when I first heard about DVCSs.

I'm like ok... So they're "distributed".. how do I share the code with other people? Oh..I push to a central repository? So it's almost exactly like SVN? Cool cool.

Do work in and rely on self hosted forks so you are not blocked, and upstream when upstream code submissions become possible again.