But the goals that these people pursue are difficult to understand or anticipate. You assume that because these people are employed by some business entity that their goals are "make more money" and such. That's rarely the case, even if we allow for the unenlightened version of "make more money".

Instead, assume that many, possibly even most, are more interested in being punitive out of some warped sense of justice. Though it might cost them a million in legal fees to discourage efforts to fix their DRM which in turn might only preserve a few tens of thousands in sales or other earning potential, they still doggedly chase these "goals". Sometimes, I think, the lawyers even point this out, only to be overruled by top management. This means that legal action can almost always achieve the goal, being that the goal is nothing more than to make their targets miserable.