That's one view, but I'd argue that they are both variations on the general problem of "how to run software on a computer without letting the owner of that computer actually control the software". When it's against piracy, the goal is to make sure that the software can refuse to run if it's not correctly licensed or to make sure that the user can't send its output to a recording, and when it's against cheating the goal is to make sure that the user can't modify or view the game state except through the standard game UI, but both revolve around denying the user power over software executing on their hardware.