Respectfully, this isn't so much a coherent set of principles about the limited monopoly copyright grants, but rather fan service. Copyright doesn't draw distinctions between video games and player piano rolls, and why would it? What would lead any of us to believe that we'd ever alter copyright to forfeit rights when things are DRM'd? One of the complexities of copyright law is that it's harmonized across much of the world, so you're asking for radical changes not just to US law but for all of Europe as well.