Why would I give money to an organization where the majority can vote against me, instead of just donating it to something specific I personally support?
You can donate it to an organization which claims to support your goals and then decides how to spend it without any vote whatsoever. I don't see how that is better. Or you can just donate to very very niche things and dilute your voice.
I think there's room in between for a organization that listens to members.