As far as I can tell from observation, having kids is probably the biggest contributor to divorce. Having kids completely changes the dynamics and expectations of the relationship. You can be with someone for 10 years and the relationship is all about the two of you and its wonderful. Once you add a kid, before long the relationship usually comes second to the child's needs.
I'm in a different social group but the dynamic that I see a lot of is that women around my age (early 40s)...that got married in their 20s...realize that their kids are teens, that they're totally self-sufficient financially, and that they have zero compatibility and emotional connection with their spouse. In fact, sometimes their spouse is sabotaging their happiness.
That's pretty much why I divorced and while going through the process, I ended up referring 5 gfs to my lawyer. 4 of them are now divorced also.
I'm sure having kids may contribute to the problems between partners but I also think that many of the women in my age group got married too early and weren't compatible enough with their ex-spouse.
Or people who divorce at 50 for example, the men become indentured servants to their ex-wives for the rest of their lives.....
My fiancé got divorced at 50 and isn't an indentured servant. He pays a fair amount of spousal support that is reasonably termed.
I have female friend who's in a her late 40s who pays SS to her ex and will be paying it for some time.
Your gender-biased generalizations are ridiculous and never end.
IMO it always comes down to money in the end.
Active listening will likely show this is true about your friends.
We go through "nesting" phases once we have children. WE buy "stuff" and this puts us into a state of financial stress.
I can't say I got divorced due to any financial issues...nor did anyone I know that's gotten divorced lately. I'm sure that happens a lot though.
Like I said, in my age group, its just a lot about being very unhappy and unsatisfied with the other partner. Different lifestyles, different parenting styles, different wants & needs, incompatible sex lives or no sex lives, and mostly the idea of growing old(er) with someone who you don't even want to be around.
It is however nice to have control over my own money since I got divorced.