There must be some bad apples but mostly they are focused on their sport and the team and don't have time or energy to make trouble, and if they do make trouble, they are off the team.
The time some people attacked me at my dorm I ducked into the room of the captain of the rugby team and that was the last time they came to my dorm. The captain of the football team at my high school was popular because he treated everybody well, I'd say the same about kids who were stars in youth soccer. In fact, even though I didn't feel terribly engaged with it at the time, youth soccer is a precious memory to me because it was one place where I was never mistreated (a group photo shows me standing next to the coach who probably gave me just a little extra attention because of my neurodivergence.)