“Around 80% of all heterosexual divorces are initiated by the female spouse.”
I’m sure they do it for no particular reason. Just because ...
They do it because of poor domestic relations asset planning by gullible and ignorant men.
That was precisely the premise of the 1970s sitcom One Day At A Time. The protagonist left her husband for no reason that she ever felt it necessary to provide, to anyone, her daughters or to him. It was just what she wanted.
As the show progressed, her ex-husband (played by Joseph Campenella) was repeatedly shown to be a perfectly fine gentleman, loved by his daughters, who tried his best to be part of their lives. He had no apparent flaws.
One day, his wife simply left him because that's what she happened to want. She wanted no man in her life, and what she wanted was what would be done. He had nothing to say in the matter, and (in the real world) the courts and legal system were in full agreement.
To me, that's been the prototype for marriage ever since. I see precisely zero evidence to the contrary.