I disagree, but Herb certainly has the acclaim to prove his point. Poor taste is offensive even if it is funny. My main objection to the bitter satire school, I think, is the ugliness that pervades it both in drawing and in subject matter. There is no warmth to it. No effort to present anything but a harsh picture.
Poor taste is still offensive even if it is funny.
Sarcasm as a steady diet is not a very palatable dish. I think it's an important element of any good cartoon. But it must be done with responsibility. Being controversial just to see how many letters to the editor you can get is not responsible cartooning. I believe a cartoon can be witty and funny without being repulsive.