[brlewis]

In this particular case, the problem is that everybody thinks that if you include women you'll get menstruation right. This applies both to Fitbit assuming we didn't need to consult a gynecologist, and to outsiders assuming Fitbit must not have put women on the project.

More generally, there is a lot of sexism, at least in the U.S., which makes people more inclined to see it everywhere...it's a natural human bias.