Then we don't live even in the same world. By taking into account how much people has the economical means to just "make music for the sake of it", I'd believe that a very small proportion of all artists actually don't seek profit for their work.
That aside, I believe that the right to defend your intellectual property is of extreme importance and the digital counterpart to ensure that right is, guess what?, DRM.
If your platform (i.e. the internet) does not give you a way to protect intellectual property then creators will eventually dissapear or move somewhere else; you can't expect to just get things from some place and never put something in return for that, a system needs to be sustainable in order to exist by itself.
DRM tries to make the overall creator/consumer ecosystem more sustainable, and there's nothing wrong with that. That is the supporting argument behind "you have to want DRM if you care about music".