He's fully right. The success of a software sometimes has nothing to do with its technical merits (as Linux punters always say about Windows...)
Git is truly an horrible piece of software cobbled together. Just open source is more and more dominated by a monoculture where a bunch of "influencers" tell everybody else what is fashionable and what is not - and people fear about not being fashionable. Then lemmings follow.
Yet, the bad effects of a monoculture are already evident - for those who aren't blind and brainwashed.