In Silicon Valley today it's not possible to hire more women simply by recruiting them. Good engineers today have their pick of jobs, and good female engineers are being stalked like the last antelope on the African veldt.
Etsy's solution doesn't seem to be to stop sexism, Etsy's solution appears to be train more engineers, take a risk on junior women engineers out of Hacker School, and let their risk taking and boots on the ground approach serve as a signal to senior women engineers.
None of this is evidence of sexism in CS and engineering, it was a winning strategy to defeat scarcity.