It's an observation. Not about the fans on this site.
We only have true fans and casual fans? Who puts who in which category?
I think there are fans out there who wouldn't classify themselves as casual fans, but when the team is as boring to watch as they were today they'll think twice about going to a game...or even watching it on TV. JMO.
It's entertainment..when some people aren't entertained they find something else to do. I haven't missed a game in person, on radio or TV in more than 35 years (football or basketball)...but I'm not going to pretend or assume that I'm a better fan than you. You should do the same.