As part of the policy of the current administration, the EEOC has dropped all cases related to LGBT discrimination in the hiring and the workplace[1] and is refusing to take new cases.
If you focused any effort on addressing that, I suspect someone who isn't even in the union would come out of the woodwork to say "that union shouldn't be addressing policy like that, it's divisive and what about everyone else?"
Union workers' rights and interests are impacted by policy that discriminates, pretending that isn't so doesn't get us anywhere.
[1] https://www.equalrights.org/news/eeocs-decision-to-drop-lgbt...