Earlier quoted context omitted.
You say you refuse to learn them. If you're not going to learn their technology what use can you possibly be?
I think he means that he's not going to learn it himself independently because he doesn't use it for work, and he's learning/using other technologies for his personal projects. And all technologies are more useful to him currently than the one's for building billion visitors/month sites.
I love learning new things, but to be honest I don't find a good use case for e.g. Hadoop, at least not in my personal projects. Nor they are attractive to me. And it's not because I'm not into non-mainstream tech, because I am into R, Haskell, Redis (yes I know some of you might consider them mainstream).
Lets say you don't have a super-model-girlfriend but you want to know everything about them... Some people like to do that I don't.