The reality is, the reason why many in the LGBTQIA community are out, loud and proud is because this sentiment of "shut up about it" you hold led them to suffer in silence and be treated horribly by the hetero majority, sometimes to the point of suicide.
Nobody has ever been hostile or violent to you for kissing your heterosexual wife/girlfriend in public. Gay people born before about 2000 cannot always say the same.
Conservatives have this nasty little trait where if something hasn't happened to them yet, they cannot empathize. "Oh I started caring about the LGBTQ community when my son/daughter came out -- not before then." It's a character defect worth working on.