All sports, no matter the discipline, have somethings in common. Swimmers have to learn how to stroke and kick, baseball players have to learn how to swing and catch, karate-ka have to learn how to kick and punch; every sport has basics.
The basics, no matter the sport, are the foundation of every sport. Solid basics usually means solid everything; and if everything is not solid, get some grease on that squeaky wheel, please!
There is some credence, a lot of credence, to understanding the basics of multiple sports; running well, having good jumping technique (pick a sport...), good general physical preparedness (push ups, sit ups, etc), dribbling a ball, lifting a weight, whatever the action may be (yes, even curling) lends itself to you becoming a better athlete.
Better athletes perform better athletically --makes sense, doesn't it?
I say all of that to simply say this: don't discount any aspect of physical activity that does not directly relate to your sport. If you take a long, hard look at what you do and what someone else is doing, you'll be shocked to find out that there is a lot to be learned outside of your own walls.
I'm just saying...