Seinfeld isn't a "show about nothing."
It's a show about a group of friends who make really bad logical and ethical decisions, over and over again, with no signs of maturing or learning from their mistakes. We laugh at them because we think we're smarter. The writers laugh at us because they know we're not.
@paxterrarum There's a lot of shows like that.
You give the target audience something that even the lowliest of them can look down on, and they think it's funny.
I don't like shows where the point of the show is that everyone's stupid and shitty to each other.