It really has to do more with that comment, the Punisher can't be put in a believable/realistic environment, because he is a COMIC BOOOOK! character trying to kill a guy with a ****ed up face. It's ******** really, which is why I bring up the Batman comparison, a guy in a batsuit running around fighting crime is pretty ****ing ridiculous, but Nolan was able to put that in a more realistic world. It's weird to think that a Batman film was/and is going to be less cartoonish than a Punisher movie.
And to go a bit off topic when I think of the Punisher's environment I think of dark shadows, like the teaser posters that were just released. Not steel blue, sodium yellow (a whole lot of sodium yellow), green (along with some sodium yellow too), red, blue/purple colors, probably more.