Why are Jeff Hardy fans called marks or not real wrestling fans?

Many people say that Jeff Hardy fans are just marks or they don't know wrestling. I don't get it. He's a good wrestler and he's got skills and people like him for that. So why would you call those people marks or not real wrestling fans?
Update: I'll admit I'm a teenage girl but I'm not one of those girls who watches wrestling b/c the wrestling are hot. I watch it b/c I actually like the wrestling.
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