Can young people make better choices than their parents? Or has the divorce rate been so low because parents had a bigger stake in mediating to save face?
In the end, I feel it's a healthier environment for the children out of the marriage. Love marraiges are a more natural, a more realistic option over the arranged marriages setup, but I think it also needs both people to be extremely mature, not greedy, and make proactive effots towards keeping the relationship stable. That is sadly something I can't think of the people I see around, in the society we live. People are way too greedy, so it's easier for them to abandon their partners and move to 'greener pastures'.
Just for fun, it's worth pointing out that marriage itself is a human-created institution and not exactly "natural". But if we explore this rabbithole we then have to start asking what natural even means, and if man-made things are natural, and so on.
But it's an interesting point to include when thinking about such things, because it's a good reminder that most of these things are constructed and actually very context-sensitive (eg- arranged marriages were probably once more realistic in older configurations where family ties played a more important role in an individual's survival).
Family ties are still as important today as they were back then, which is why people ought to think more about their children and their mental health when they decide to part ways for their personal greed.