"The 'big deal' is that her comments already did damage. Not everyone who saw it or heard about it is necessarily going to find out--or care--about the apology."
Yes. And also, her apology was insincere -- not something she really feels, but something she felt it necessary to say in order to try to save her job. Her apology was, "From ballet to anything one wants to explore in life, I say GO FOR IT. I fully believe we should all be free to pursue our passions." But if she truly believed that there's nothing wrong or funny or "gay" about a boy taking ballet class, she wouldn't have made that face, laughed, and then followed up with that ridiculous comment in the first place.