Yes, really.
For those people that need a thousand of them, it might make sense to fabricate them using another process. Or even a few dozen of them.
But if you only need one or two, or you want to customize them, or you want to use the makerbot to make its own replacement parts, then of course it can make many of them itself. That was one of the major goals of the projects the makerbot derives from.
It's faster, however, to use a laser cutter and sheet material though.