My impression was the author didn't like all the additional complexity git comes with (sure, you don't need to use it but it's still there) I think the mention

My impression was the author didn't like all the additional complexity git comes with (sure, you don't need to use it but it's still there) I think the mentions of software like GitHub were more in terms of workflow since apparently Fossil bundles all that together in a static binary (you don't have to integrate the tool chain yourself)