This is literally how pride is, isn't it? Someone admits they prefer to have sex with men instead of women and then people pretend to be excited for them not having to hide it anymore, even though normal people don't openly discuss their sexual preferences nor make it a part of their identity.
Alright... I admit I'm a bit jealous. When will people be proud of me wanting to have sex with cartoons??? I'm tired of hiding it! My coworkers should know!
Pride is not feeling ashamed that you are attracted to the same sex. And feeling embarrassed when coworkers wonder why you are not married with kids. Having to lie about someone you are dating because they are the same sex.
Not hiding and saying this is who you are is a big step.
You do realize homophobia is still... like, a thing, right?
Also, people constantly mention or reference their own sexuality. You don't notice it because it's straight, but every time a male coworker mentions his wife (or the opposite) that's an indirect reference to their sexuality. Every time the male lead kisses the female lead in a movie. Every song where a male singer sings about their girlfriend or some girl they like. There are also baby shirts that say stuff like "lady's man". Granted, most people also find those ehh, but they exist.
Fact is, being straight is considered "normal", and other sexualities weren't, and still aren't to many people. This means that, yes, some people are gonna make a deal about it.
Some of my friends never really "came out", because it was actually normal for them, so they never had to figure it out. For myself, I was mildly homophobic when I was a teen, which meant figuring it out was a bit of a process, so me "coming out" did mean telling my friends. Now imagine how it is for somebody who grew up in an extremely homophobic environment.
All of the queer people I know irl "make it part of their identity" just as much as you might make "being left-handed" or "being spanish" part of your identity. That is to say, it's a fact about them they might mention occasionally when relevant, or make jokes about it, or reference the culture. But you don't bitch about that, do you?
TLDR: your comment seems to stem from pretty complete ignorance about... well, everything you're talking about. Please don't be dismissive about stuff you don't know much about, it makes you look bad and a lil' self-centered.