I'm a little confused here. You think hobbyists needd DRM. It was my impression that hobbyists are againts DRM. So what does that have to do with anything your concerned about? It sounds to me like people just want to complain when they hear Microsoft doesn't want to share something no matter what it is.
This article isn't saying Microsoft wants to shut out hobbyist altogether. Hell they are giving away development software in the form of Express editions and hopping on the DIY band wagon with their coding4fun website.
So really, take a careful look at what they are really doing. Shutting you out of something you don't want anyway.