The purpose of gay left activist groups like HRC, P-FLAG, and NGLTF is not to promote the rights and well-being of gay people. The purpose of these groups is to fundraise from the homocommunity to support Democrats and mobilize LGBT voters to vote for Democrats.
For example. Donald Trump has nominated Rex Tillerson to serve as his Secretary of State. Tillerson played a major role in getting the Boy Scouts of America to openly accept openly gay scouts into their organization, and has consistently been the kind of person LGBT Activists would characterize as an ‘ally.’ (Heck, the Family Research Council characterizes him as an LGBT ally.)
Supporting Mr. Tillerson would be in the best interests of the ‘gay community,’ but opposing him is the most useful position for fundraising and for supporting Democrats in their efforts to undermine and delegitmize the Trump presidency. So, guess what position the LGBT Activist Groups are taking?