As per the (dictionary) definition of sport....

1. an athletic activity requiring skill or physical prowess and often of a competitive nature, as racing, baseball, tennis, golf, bowling, wrestling, boxing, hunting, fishing, etc.
2. a particular form of this, esp. in the out of doors.

So, the answer to your question is simple. MF is a hobby and yet another form of table top gaming. Warhammer, Battletech, Risk, etc., all fall under the same category. MF is not a sport. Nor is Electric Baseball. Rod Hockey, Air Hockey, Foosball and the like are quite a bit closer to the "sport" category but are still not considered as sports. They do require some sort of skill and "physical prowess", however slight on the physical part, that MF lacks.

MF = Table Top Gaming & Hobby.

-Mike Pratt