I'm getting married to get a 50% tax deduction and cheaper healthcare. Also we're doing it to pretend that we are a super normal heteronormative couple so that people of my sick country don't burn us at the stake.
With no plans to have kids, the works of art that I create are my children and I devote my whole life to productivity and to my partner, but I sure am going to pretend that I'm planning a child next week so that everyone gets off my case.
Having a child is a 12 hour a day job with overtime and minimal social payout. To have a child I would have to spend less time with my partner, less time with my cats, my friends and other family and less time on doing interesting things.
It would be cool to interact with a smart kid that's developing into a healthy adult that's also your good friend with similar interests, but there's a mountain of responsibilities that don't make it remotely reasonable.
Divorce after 27 years for a couple with no financial interdependence seems odd. Like it must have been motivated by something recent otherwise it would have lasted for another 50 years. One side must have decided they've had enough of the compounding annoyances and the kids are old enough to survive it, or the other side must have done something despicable.