If a sport just requires eye hand coordination, then knitting could be considered a sport.
If NASCAR is considered a sport, then a road raging a-hole is an amateur athlete. I guess. Assuming you got to be an athlete to participate in a sport.
And if pinball is a sport, then sitting on your couch playing video games is also a sport.
It's all subjective but I feel a true sport requires the participant to be physically fit and requires some sort of physical activity. With that said, maybe a porn star is an athlete. It's an argument you can't win.