This is a total crackpot theory but hear me out guys.
I was born in 1996 and obviously cannot have had experiences predating my birth. What was normative behavior so recently as 1980 is beyond me except so far as depicted in records. Those records tend to be either fictional or do not recount the nitty-gritty mundane-isms of American cultural norms. Therefore, short of asking an older person who was there (which would be an awkward conversation to say the least), I have no way of confirming or debunking this.
But anyways:
In the past, male-on-male interactions often took on a flavor that today would be interpreted as homosexual, homoerotic, etc., though in fact the common people of these times generally didn't think much about the subject if at all.
In the 19th century, strange men might rent a room together for the night and sleep in the same bed. Written correspondences between close male friends might read today as if between lovers. As late as the mid-20th century at least, young men might share a space completely nude in certain sports-related contexts. There were no cultural taboos against such things, whereas the men of 2022 are reportedly careful to avoid giving off "gay interest" signals through their body language and eye contact.
Compared with today, the not-so-distant past was an Eden of intimate male bonding that carried none of the connotations it does today. This was parcel and package to a wider condition where social cohesion between men was greater, the near-ideal state of affairs whose passing was lamented by Robert Putnam. This "civic friendship" enabled broad interest in cooperation and sharing of skills and passions toward a diverse array of overwhelmingly positive ends.
This age did pass, and for many reasons. But it also coincided with the rise of the LGBTQ movement. Suppose that, by introducing a dynamic of homosexual possibility to interactions between American men, the coastal elites shattered group cohesion in areas where emotional/social intelligence was lower. Getting very close to somebody of the same sex without making them feel threatened and scaring them off, especially in the post-adolescent phases of life where making new friends was generally harder for men already, took a certain nuance that with a deficit of said intelligence might prove more challenging.
As history is decided by the best organized factions, this was one trick which helped the old bases of power keep their edge beyond what was otherwise natural. To be clear, I am by no means blaming everything on that one thing. That would be silly. But perhaps it was a factor.