Rapid rise of private club and travel teams found in youth sports
phys.org
phys.org
Hockey in my area (Minnesota) is effectively year round. Hockey families are almost isolated in their own worlds they spend so much time on it. I know some basketball families like that too ... only time we see them is a wave as they're coming and going.
If they're happy I guess that is good, but the cost in $$$ and time, you almost need a parent dedicated to spend much of their non working time to this sport seems like it would exclude a lot of people.