so let's just create 4-year age bracket teams and have 6th graders play against 3rd graders, and high school sophomores play against 7th graders. who do you think will dominate? think that's fair? once you get to college most kids have gone through puberty and can control how strong they are by working out and exercising. that doesn'w work at the younger ages, which is why almost all sports have age-based teams. do you think it's a coincidence that more often than not the "best" kids are also the oldest? This will all hopefully even itself out as the kids mature and get older but at the younger ages it makes a huge difference. That is a fact.