Not involved with Leap at all, but I've always felt like this sort of thing depends on how much discrimination your group is subjected to. Self-segregation like this provides a forum for constructive discussion, particularly if your group is still subject to discrimination (e.g. being undermined by the dominant group, intentionally targeted by trolls, threatened or cajoled).

I don't know if it's a useful analogy, but I consider it akin to global warming being discussed by climate scientists in a totally public forum. The volume of anti-global warming sentiment and media coverage (both for and against) would completely disrupt such attempts.