Oversimplification, but I think you're doing it for effect. Even so, I'll spoil the figure for you.

Thing is, there's more than death that's bad. Sometimes, what doesn't kill us maims us instead, which is one reason we have semi-sociopaths and psychopaths among us.

And yet, your general point seems valid: that Hollywood doesn't have much choice in the matter. The villain must be seen as unhuman, worthy of violence applied to themselves by virtue of their having broken the social contract in irrevocable fashion. So long as the public continues to demand movies from the genres of action, suspense and horror, we present the industry with no option but to justify counterviolence - and of a truly satisfying nature - by the proclaimed heroes of the film.

In short, it's our own fault for paying for the rental.