Great post coach, and I agree, you should be ticked off. bcb3 hit it right on the head, but I think the travel coach is skirting their responsibility to protect the kids.
I place a little blame on the student for being a little selfish, knowing that an injury that happens while participating for wither team is going to dramatically effect the other.
I have always told my kids that if they are playing a school sport, that will be their dedicated focus, everything else is secondary.
On the concussion side, this girls parents need a serious talking to. My middle son received a mild concussion during his first year of tackle football during his last game. No questions about it, I ended his football right then and there and told him he would not play again until he got to HS, and then the choice would be his. Can't play games with injuries like that.