I mean, nominally, but honestly how many of us actually use Git in a distributed fashion? I think most of us treat Git more or less like Subversion with local committing and much better merging.

I think what the person was referring to was something more along the lines of a DHT (e.g. Pastry or Kademlia), IPFS, or (as they mentioned) Tor, where it can be truly leaderless and owned by everyone and no one at the same time.

I think what they meant was GitHub, not Git.

A common conflation these days, and one GitHub works hard to reinforce.

Sure, but a vast majority of people who use Git will centralize it, with Gitlab, or Bitbucket, or SourceForge, even barring Github.

While the git program is allowed to be decentralized, pretty much everyone's workflow is decidedly not.