heh, this was my argument back in like 2009 when everyone was all, "DECENTRALIZED!! We have to take months to migrate from SVN to git cause DECENTRALIZED!! You don't one a single point of failure do you?!"
all I could say was, uhhhh github is a single point of failure. Unless you're mailing diffs around like Linus (which nobody I knew did), it's 6 of one, half-dozen of the other.
there are lots of great things about git and especially git over e.g. svn (especially merges) but I never bought the decentralization argument the way it was spearheading the conversation back then.