I am not out and don't really believe in the concept. Why is that wrong?
I don't know that it is intrinsically wrong. I can argue it both ways.
I have always advised gay men not to come out if that will disadvantage them, with family, friends, employers and society. It accomplishes little to throw ourselves on our own swords, when we can do so much more for ourselves and other gays from positions of hidden power, rather than from personal ruin. But that does assume we do SOMETHING in the background, and not merely feather our own nests.
Yet, if we CAN afford to come out, if we can do that, as I can and others I know who do, then I think we MUST come out. SOMEBODY'S gotta do it, and those of us who can should.
I'm not bothered by the fact that some guys can't be out, and can't do the things that I and others do openly. I'm not quite that fanatical about my gay beliefs.
But I DO get ticked by gays who COULD be doing something, who are at no personal risk or inconvenience, but who do nothing. Now that does bother me. It's like "Don't call me while you're fighting against the forces trying to make gays illegal and devoid of civil rights, but do be sure to let me know when you win, so I can cash in with everyone else." Can you spell S-E-L-F-I-S-H ?
And as far as "sharing my sexuality with others" I never do that. It would be like saying "Hi, I'm Bob, I'm right-handed!" or "Hi, I'm Bob, I was born in New Jersey!" (Gawd help me...) Those facts may be pertinent later, but not something I throw out there at first meeting. Is that what you mean?