Exactly, you just named a subset of all the things you could do to a machine, partitioned by copyright protection. I'd agree with your general point in the context of power users, but it's worth noting that the average Joe will try to faithfully follow company policy as well as the law.
To run afoul of the DMCA a modder needs to (1) strip a binary of its copyright protection (2) distribute the unpacked executable or the unpacker tool (3) likely facilitate mass third-party piracy (more damages = more lawsuit potential). It’s principally warez and hacking groups that meet these criteria, and they probably ought to be sued.
I’ll add a point in your favor and say that for non-games DRM is often a big problem when reversing or patching code.