I agree with this.
My wife just turned 53--I am 52--we have been together over 30 years and frankly, life is better than it ever has been. We have raised two great daughters--one just graduated college last year. Our other one is graduating from high school this year. We are each other's best friend and love being around one another. We waited to have kids, so we could get our fun, traveling, party on in our 20's. When the kids were born, they became our primary focus, it was dance recitals, Disneyland and countless hours dress shopping. Now that the youngest is going off to college, my wife and I have to admit we are excited to revisit our 20's again and all the "adult" fun we had. Sure, we have had arguments over the years--mostly over money or kid's issues, but I can honestly say I don't think we have ever had one that festered into the next day. My wife is honestly more beautiful now than when I met her. I feel like I am aging like an old catcher's mitt, and she still gets carded ordering drinks.
We are completely non-religious-=-so there isn't that pressure, but I do think how both of us were raised greatly influenced us. My parents were married 60 years before my dad passed. Her parents are both alive and getting close to 60 years married.
As someone who has sat through countless divorces, custody and domestic violence cases, I can tell you without a doubt there are people out there that simply should not be married. They don't have the disposition or ability to maintain a healthy relationship, let alone be married.
I don't fault the OP and his life choices--you do you, man (well, i don't think you are having to do you, that seems to being taken care of by your harem of girlfriends
), but I am not jealous of and sure wouldn't trade places with him.