I think what a lot of people who hold the view of "just live your life as a gay person, don't announce it" are missing, is that just living your life as a gay person IS coming out. Constantly. Every day, and it's fecking exhausting. As a gay woman I'm forever making small calculations in my mind as to whether I'm going to use "her" or "them" to refer to my girlfriend, for example, or whether I'm going to hold her hand in public given the environment. I'm still having to make the decision whether or not to "come out" in these ways, just as I would have to make that same decision when making a formal announcement. All that is different is the scale that one chooses.
HOWEVER, that's only true for a nobody like me. For someone in the public eye, this doesn't hold. For example, Kelley O'Hara, recent winner of the Women's World Cup, who has never publicly stated her sexuality and has always been very very private on social media, kissed her girlfriend in the stands after winning the final. That one moment was photographed, and now if you google her name, the first link (after her wikipedia, twitter, and instagram) is about her kissing her girlfriend, and the 3rd image on google images is of that photo as well. Just "living her life as a LGBTQ person" ended up being no different in end result to Megan Rapinoe's more forward style. So if someone wants to control their own coming out and their own narrative, who are we to judge?