Well, that's very true. But you know, if I meet someone who calls themselves a "C Programmer," I would be surprised if they were trying to build a client-side web application as a browser plug-in in C. C Programmers tend to ply their trade in places where their skills provide value, so "using C for all of their programming needs" might work out with very little difficulty, just as a carpenter would be unlikely to try to wire a house.

Then again, there's nothing like expanding your horizons a little. While it's fun and surprisingly instructive (for me, at least) to think things like this through, I'm sure people will grant that debating how much the metaphor leaks says nothing about what you or I might think of C, or Javascript, or the benefits of learning a new programming language every year.