I have never agreed with pushing my kids into anything they really don't want to do. Its one thing if they express interest and I sign them up, I try not to let them skip practice or games. They committed to the team and they should feel the need of obligation to what they committed to. If after they season or sport is done and they choose not to play again, then so beit.
I was pushed into golf as a youngest and ended up hating the game and eventually quiting when I was 13. I never touched a club again until I was in college and only played to get a few beers on the course. Six years ago I started playing and golf hase become a passion that I truly enjoy.
I think some of these parents need to take a similar approach and introduce them to whatever sport, but not push or force them along if they really don't want to participate.
That's just my $0.02