I get what you're saying - and I agree that more needs to be done - but more cannot be done until we start treating the issues seriously. That's the point of "Believe All Women": it is the beginning, not the end. Violence against women cannot end until it is taken seriously. Even women getting the political power to fight this issue ourselves requires being taken seriously first. There is no emancipation for women from patriarchy at all until the social attitudes - which go far beyond what individuals believe - that mock and patronize women are confronted.
You can apply a similar approach to the working class: if you view workers as stupid, helpless, lazy, or uncivilized (all of which are common classist stereotypes of working class people) then you're not going to be meaningfully advancing workers' rights or our emancipation from wage slavery.
Same thing with racism: you have to acknowledge other races as humans before you can end white supremacy.
Etc.