Lets see, I can't bake a pie for shit, and have never really tried. But I love to eat the fucking things.
I mean, dude you don't have to be a football player to enjoy watching the game. Just don't sit in the stands and talk about hockey.
My buddy fucking lOVES hockey right? Dude sweats the shit out in the morning. I bet if you put him skates he would bust his legs and bleed gravy all over the ice, but he knows a shit load more about hockey than a lot of other people I know.
There are a million reasons someone might not have tried to play the sport as a kid, but none of those preclude someone from being a fan...
Common Sense answers your question.