I don't really agree with what you say, but I'd add that they did do an episode where the theme was the meta joke of whether or not society had deemed it acceptable to make HIV/cancer jokes yet, as well as 911 if memory serves. Everything in life can be joked about for one reason or another, I don't accept that there is anything out of bounds. Whether you personally find it funny is up to you, but making broader statements about this or that because a joke was made is a sign that probably you're unable to see outside of a fairly narrow field of view imo.