Why isn't self defense and learning to fight embraced in LGBT culture?

Alright lads I'm not gay myself but my older brother is and the majority of his friends and a couple of mine are. growing up I wasn't really aware of homophobia and violence against LGBT people, but in the last few years I've seen the shit my brother and friends have to deal with it makes me sick and worried about them because they don't know how to defend themselves. When there is so much hate and violence directed towards gay people why isn't self defense and learning to fight embraced and encouraged in the culture?