Option 1:
Moore was actually writing "blind" the entire time.
He was just randomly tossing shit at paper as it was coming to his head and it randomly kept working, and by the time it came out he barely understood what he had writen, so when people liked Rors he was shocked because he didn't realize he accidentally made Rors one of the greatest superheroes of the entire industry even by today's standard.
Basically the entirety of watchment literally happened by sheer cosmic accident (or thermodynamic miracle, as Manhattan might say.)
Option 2:
Moore's moral compass is so unbelievably fucked that he genuinely believes mass decimation in the name of "our democracy" based on flimsy predictions is the morally admirable option. But this doesn't work because Moore is a fucking ANARCHIST.
You're telling me an ANARCHIST wrote a story where one character wants to secretly kill millions for "the greater good", and another character believes "people have a right to know", and he was actually intending for the "right to know" guy to be the bad one? I call bullshit, I'm not buying it, especially coming from anarchist, from a bugman? Maybe, but an anarchist? An 80s anarchist? Absolutely no.
The only other explenation is that moore is literally retarded and wrote watchmen by accident which takes us back to option one.