Before I started with RMXP, I wanted to work as a game developer, or making games at least, but I told myself most of the times that it is not going to happen. The times I didn't I started with a new language. Each time. C++, Java, Flash. Blah. Not the best ways to start making games. Then I found out about RMXP and downloaded it soon after, now I know some Ruby(not much, but still), that I can map really good, and that I have the thinking needed.
So I don't think it was that much of a waste to get into the RM world. Nothing that will get you a job, but it get's you a bit on the way.