Obviously no one should be forcing you to use what you don't like. But I don't quite understand that reasoning. Except for rare circumstances, SCM use isn't a "personal" activity. It's not about what you pick for yourself, it's about what everyone collectively chooses to use for collaboration.

And in that sense, there are really high costs to variety. Imagine a world where you need to be fluent not just in whichever two of RCS/CVS/subversion/git are currently en vogue, but also mercurial, SCCS, bitkeeper, Perforce, ClearCase, etc... That's a mess.

So sure, git might not be "your thing", but I strongly suspect you'd still prefer a git-only world to one where every project you want to tinker with uses a different SCM.