It is awfully hard for the cisgendered gays and lesbians to deal with all the extra letters this anonymous "they" keeps adding, after all.
In the context, that particular comment (which was at a different panel) seemed to imply the speaker was not a part of the queer community, though I did not inquire after how they identified themselves.

GLBT excludes people who are queer and do not feel they fit those categories
Definitely. It's sort of just a new set of boxes, and while arguably I am in a box labeled "gay", I put myself into it--and not everyone has to do the same.