Do you really think this lady wishes the coach had broken the thumb of any player? It might have been a bit crass for her to say that, but if you think she really meant that the coach should have "chosen" which player to hurt, I think you are way off. She is in the same league as the person who says, which arm did she hurt I hope its not her pitching hand. Certainly they don't mean that they want the child to be hurt, just on the glove side.
Taking this in the worst possible way the woman comes across as worrying about the team more then the child. While we want our team parents to care about all of the kids, when it comes down to it many care about the competitiveness of the team over the individual players. Should you be disgusted by that attitude, sure. But to be so personally offended and want to run to the coaches and complain about the lady, I don't see the benefit. On the other hand she might have been trying (and probably failing) to make a clumsy joke to make the coach feel better about hurting his own child.
Taking this in the worst possible way the woman comes across as worrying about the team more then the child. While we want our team parents to care about all of the kids, when it comes down to it many care about the competitiveness of the team over the individual players. Should you be disgusted by that attitude, sure. But to be so personally offended and want to run to the coaches and complain about the lady, I don't see the benefit. On the other hand she might have been trying (and probably failing) to make a clumsy joke to make the coach feel better about hurting his own child.