Hello Seeker47, we preach exegetically at my church, so if a particular sin is on the pages of the Bible that the sermon is taken from, that's the one we hear about.
As for churches discussing homosexuality more than any other sin (save Westboro Baptist, of course ), I think it only 'looks' that way because it's so often made public, so it enters the news cycle and regularly makes its way onto headlines, and into social media outlets, of course.
The other, obvious reason that the sin of homosexuality seems more prevalent in discussions today is because it's always in our faces.
For instance, if there had been.....
1. Alcoholic or Smoker or Adulterer or Rapist or Murderer Pride Parades going on for 60 years now (like the LGBTQ+ have been doing),
2. if we had national organizations leading marches, rallies, sit-ins, having special days set apart at places like Disney in honor of those other sins,
3. if they also followed the LGBTQ+ lead by insisting that their sins are not only 'not' sinful, but a perfectly normal, alternative lifestyle choice,
4. and if they insisted that their sin must be taught as normal behavior to our children, from pre-school on,
.....then those sins would be front and center in our lives too.
Fortunately, that's not what happens with other types of sinful behavior because, normally, people are ashamed of all of the other sins (to one degree or another), so they don't make them into a public spectacle and insist that their sinful behavior is normal and that it must be accepted as such, rather, they do their very best to hide the fact that they are involved in those sins.
~Deut
p.s. - just FYI, this 'idea' that our churches, in general, have become homophobic and overly concerned with a single sin has no basis in fact whatsoever. Rather, it's a well-crafted lie that's being perpetuated as part of the LGBTQ+'s political agenda (and thanks to the folks at Westboro Baptist, it's a lie that everyone, so far, has accepted as believable, even though there have been no demands for any factchecking concerning it).