I tried to get my husband to engage in fixing our marriage for a long time before I bailed, at which point he was devastated and begged to try again. I think perhaps he / they are so arrogant or inert that they just don't think their wives are being serious about potentially ending things
This is certainly what happened in my second marriage. Because it WAS my second marriage, I had learned many lessons about myself from my first marriage- mostly about my methods of communication, as ALovingSpirit alludes to. Hints and subtleties weren't enough, let alone expecting a certain decent level of behaviour as a basic.
So in my second marriage, if he upset me, I told him directly why. If I needed something, I asked for it directly. No hints, no games, no subtlety. Occasionally he apologised, but mostly he just argued at me, telling me why I was 'wrong'.
When I reached the point of saying counselling was needed, he had one job- to research counsellors. This was to prove that he was interested in our marriage as something other than a convenient housekeeping service for him.
He didn't bother. And he was shocked and upset when I called time on the marriage, and couldn't understand why I'd "given up so easily".
I think, in his eyes, because I'd put up with his behaviours for so long, that that 'proved' that he was doing things the right way. Add to that his natural belief that he was Right and I was Wrong (this wasn't personal, btw- just his view of himself and literally anyone else) and that was that.
He too believed that men believed more in marriage vows lasting forever. But that was only on the condition that he NEVER had to adapt to accommodate his marriage/wife/family.