Earlier quoted context omitted.
They would be a laughingstock if they did implement a voice adjuster. It makes it appear that rampant sexism is such a problem that they have to implement protection against it.
I don't get this at all. Even with just names discrimination has been shown to occur at places like universities, so it wouldn't be revealing a problem, it would be being proactive in case there is one. Trust but verify. Second, a perfect excuse was provided: for science! Its not that they think they are sexist, but an untested hypothesis is less strong then a tested one.
Source? Also, universities are much different than ycombinator so I'm not sure what point you're trying to make.