Are you essentially saying "alliance for women's safety" is not "rewarding" at all but alliance to bi-sexuality is, and your reason is in the first case, you have to put in action, but in the second case you have to just validate the existence of bi-people? First of all, why push women's safety under the bus in hope of getting social validation for you? Believe it or not, keeping everything aside, it's more women than men who support or at least don't actively work against lgb people. And, secondly, being an ally to women's safety is also mostly validating women's rights, freedom and happiness, given that most of the attacks on women come from someone known to them, it really mostly needs people's validation about women's rights to both freedom and safety to uphold women's safety. It's not much different from the vaoidation of the lgb part of the society.