All of this. He doesn't know what he's talking about. I coached travel baseball for five years with my oldest son and it was a great experience for all of the kids. You want to get better you have to play a lot and do so against good competition. I had one kid who's about to make the majors and a couple others that eventually could (going to major D1 schools). It was a very tight group of families, all of whom enjoyed the time together. Of course, we started traveling way before high school, too. I get constant emails to this day about camps, clinics, tournaments, etc. from many places.