Excellent topic and one I have heard debated at diamonds all over the Southeast over the past couple of years. It is my opinion that most kids will gravitate to the sport they enjoy the most and that will influence the choices they make and NOT rules and regulations set by TSSAA or anyone else. My son is still a year away from high school but made the choice 3 years ago to play baseball only. We have given him every opportunity to play other sports and he has even been encouraged by some family members to play football but he has stuck to his committment of playing a sport that he loves more than anything. As for family time - it depends on what your definition is. We spend countless days at fields across the country as a family. I am asked every day as soon as I get home from work to play catch, batting cages, etc and in doing so we always get to talk about the other things in his life. Our vacations as a family are always baseball related and we have a blast. We are lucky to play with a good group of parents and coaches on his travel team and they have become our extended family - we look forward to seeing them every weekend.
The point is there is no right or wrong answer - it is a matter of choice for the kids and the parents. It is my opinion - right or wrong - that we are to support our kids in whatever keeps them interested, active and out of trouble regardless of what that may be - one sport, two sports, no sports at all. The most important part is that we are getting them around positive influences that teach them important lessons outside the lines.