Intervening in an altercation

Men why don't you ever intervene in fights why is always a women that have to try to stop it? Like you see a random person going around and starting something (no weapon) with random people and yall just stand around when they hit someone. I get the whole fight or flight thing but after a second you snap out of it. I've been in a situation were a fight broke out and I stood there for a second and then jumped in. Also I hate how people try to hold back the person whos defending themselves like why jump in AFTER they started to fight back?

Women why do yall jump in where its 2 grown men fighting? Im not going in without a weapon. Or how they just randomly intervene and start fighting the "good" guy like what are you doing. You dont even understand the context of what happend yet your swinging?

People now a days have the mindset of (thats not my business) which i understand but it come to a point. Especially if someone is looking at you and asking for help like come on.