In my experirnce, men opted in
In the mid/late sixties, men married early to avoid the draft. Virtually all my friends and college friends married and thus avoided the draft.
The fact is that most of the men remained in these marriages for decades.
I’m not downplaying your experience, I’m just trying to find out why—nationwide—the marriage rate started going down after 1946. We all know it’s women’s fault (somehow, always). I’m just trying to find out what women were doing wrong even in the 1950s.