Glad to hear you're queasy. Actually, making a public declaration to be LGBT is a pretty important thing to do, when it is safe for a person to do so. Coming out is a crucial political act that demonstrates to the world that you will not be silent about who and what you are, and it shows solidarity with others around you. It is ONLY because people have come out publicly in numbers that LGBT people have achieved the rights and level of acceptance that we have so far. Yet those rights are continually under attack, even more so in recent months (I'm looking at you, Florida). That is not to say that everyone needs to come out, or to come out in a specific way, or at a specific time, but to treat the act of coming out itself as if it's no longer necessary or important is reactionary and gross. It would be great to live in a society that is beyond labels, where coming out is no longer necessary or important, but we are not even close to getting there yet, and trying to short circuit the process will only hurt queer people in the long run.
Harry Styles is not privately queer. He publicly wears queer drag, imitating other artists who came before him, and he waves the pride flag around like a prop. He coyly suggests he might be queer, but then avoids the question or deems it irrelevant when asked. Yet he's only ever lived a public life as a straight man. His career has benefitted tremendously from the appearance of being Schrodinger's queer. Until he opens the box he is or is not, depending on what you want to see. All the more incentive for him to never open the box. Meanwhile Lil Nas X risked his just-started career to come out in a particularly homophobic area of the music industry, and Troy Sivan came out and made queer music for queer people. They are not the same.