This stuck out to me:

  OSI, which has somehow anointed itself as the body that will “decide” whether a license is open source

Isn't 'open source software' a trademark owned by OSI, and the actual words "open source" invented by the people who started OSI? Which would make the above a tautology. Before OSI there was "free software" but no "open source software", and the meanings subtly differ.

I can be wrong here, and I don't directly see a clear answer on the OSI site site