There are so many (work and self-imposed) obligations and "obligations" and BS, that it's even difficult to have quality/fun time with one's spouse.
And this certainly cannot be explained away with "the spouse is a tiny part of your current experience/identity".
So I think this answer doesn't cover the actual issue.
And it's not just workload either. Someone else writes below:
>In order to have impromptu visits that fill up the empty spaces in your life, you first need to have empty spaces in your life. That is largely incompatible with filling every moment of your life with work or career advancement.
But the lack of "impromptu visits" is also apparent in people who don't fill every moment of their life with work or career advancement. The killing of community/communal spaces, the advent of 100 TV channels and 8 billion internet/"social" options etc, also kill a lot of such time.