It's not that this instance is meant to be an echo chamber, it's that it's meant to be welcoming, inclusive, and queer friendly. Saying that we're over-represented, ackshually, isn't really contributing to the discussion other than to tell us that our lived experiences of being under-represented are wrong. It implies that a statistical/percentage-based over-representation of a minority group is a somehow a bad thing. Less charitably, it sounds awfully similar to being told to sit down, shut up, and be happy with what we've got.