Many kids don't love practicing 35 hours a week especially when many have gone from the best players on their club or school teams to players that barely get off the bench if ever in college. When they hit the turn going into JR year many choose internships and just to enjoy everything college has to offer the last two years without the rigors of a fulltime lax job. We can all fool ourselves but if you don't think some of these kids are playing just because mom and dad have always pushed it you are being naive and when they reach 20 years of age many are now mature enough to push back on mom and dad and tell them they are done. That's why only 50% play all four years.
Makes sense. Even the kids that play get tired of the pressure placed on them when the team is not winning games. It all gets old.
