Yup.
100% true.
In my younger years, I was so talkative, cheerful and loves to share my thoughts openly.
But marriage life showed me that its better to talk less.
Because after 1,000 arguments with your partner, you don't care who win or who lose, you rather to end the quarrel sooner and go through your tasks quicker. And most of the arguments are just trivial in the first place anyway.
After 10 years plus, you build a careless attitude, with a stoic face that helps you handle so many situations with ease and less headache. Its a bliss, on the expense that you no longer your younger self anymore, but I suppose that is part of growing old too.

So when I look at these very young couple, I emphatise with them. They're still hungry for attention, hungry to be win arguments, hungry to play victim, but lose sight of the goal of marriage. Frankly, both of them are just not ready for marriage at all, but like all your lovebirds, they think love is enough. And now they realize that when love is absent, only hate, bitter, pain exist. So they resort to violence, scandal, divorce, etc.

But its not the end of the world, divorce is simply a part of the experience.