Another aspect of team sports that my husband and I have decided to agree-to-disagree about:

He maintains that only sports can give the kind of team-building experience that's so useful later in life.

I tend to think a very similar sort of team spirit develops when people play together musically. (Granted, we still want them to stay active; I just don't think it needs to be in team sports, which tend to be more competitive and draw out their perfectionist tendencies.)