Peer pressure is a strong thing. A parent has very little recourse to change the mind of their children.
In my case I find sports uninviting. My son played soccer, I picked him up and dropped him off at games and practice. He got frustrated early on, lacking the skills. I do not have the skills so I was no help. He wanted to quit mid-season but I told him he had a responsibility to the team to finish the season. He never wanted to play sports again.