Not sure this is entirely true. Compared to some of the previous petitions / walkouts, this one was relatively minor, and was mostly the whiny ones.
If there was a concern that impacted every non binary Googler and they all spoke out passionately, it might not register as a major voice, but it still seems important to listen.
Should we only concern ourselves with what the majority thinks? Isn't that the groupthink I see everyone talking about? Or should we take time to listen to these minority viewpoints and ensure we are building an environment where they feel welcome?
I'm sure 1 pct of people are white supremacists but we don't listen to them just because they whinge
... And your implied comparison of Google's trans employees to white supremacists suggests you may not understand this difference yet. Some aspects of morality are considered (legally and morally) no longer up for debate.
Perhaps you know already that the white supremacists are wrong, no matter how many of them there are?
This is the fundamental meta-question of appointing an ethics committee: you have to have some idea, already, of what is ethical. That idea could be—but probably isn't—to follow the world around you in proportion to their beliefs. That idea almost certainly is to follow your own existing sense of right and wrong. You want to find people who seem better at you than reasoning but the same as you in ultimate values. You want people who are going in the same direction you are, just better at getting there.