A) If you listen to sermons (good) pastors are preaching to their people, I think you'll discover very quickly this isn't true at all.
B) You *have* heard more public comments from Christians at the societal / cultural level about it, because (as "crass" as the meme below can come across), this is generally how our culture has functioned for about ~15 years.
It is simply unfair to have a culture waterboard your family with various expressions of Queer Theory for two decades, but when you say anything about it, they go, "Whoa whoa whoa... why are YOU so focused on THIS issue!?!?!!?"
Simply put: We aren't. You are.
It's been in every classroom, TV show, movie, album, school library, marketing effort, HR Dept, professional sports season, June calendar, corporate training, legislative agenda (from one party), etc for ~20 years.
And we are sometimes forced to respond to that for the good of society, to disciple our people, and to parent our children.
Why does homosexuality seem to be the only "sin" Christians are concerned with? The Bible has plenty to say about adultery, greed, hatred, lying, stealing, hypocrisy, judgment, and how we treat others.