I never played sports, and didn't like much physical activity past around 12, but before that I would hike around local forests (you know, random peoples private property) and we would build tree forts. I would have hated a forced competitive environment at that age and would have resented my parents for forcing that on me. It is important to introduce a child to the existence of sports, in the sense you need to expose them to as broad a spectrum of activity and skill as possible. But to force it upon them even if they don't take an interest in it is going against their personal interests, and they won't enjoy doing it.