If you have kids, the commitments you've made are not just to your spouse/SO/whatever, but also to your kids. Those commitments are long-term and failing to keep those commitments is very damaging to kids. I think if more people took those commitments seriously, they would find ways to solve problems. As it is, why bother trying when it's easier to just say "screw it" and separate.
There are some marriages that should end. There are men and women both who have no business being attached to another human being. But I think more marriages end than need to, and it's a net-negative to everybody involved (which means all of society). Learning how to live happily with another person (and it is difficult, no questions; I'm going on 20 years and it stays just as hard every year) is one of the most satisfying things you can do and teaches you many important lessons that positively impact one's life in areas outside of the home.
Yes, often people are too quick to give up on their marriage if there are not legal complications on the way but, when that happens, it is more of a social or should I say cultural problem. IMO it's always wrong to apply pressure through law for those sort of problems.
Even if by using increased legal restrictions there appeared to be a net-positive in that specific context, I feel that there would be a net-negative in a larger scale, as it would violate individual freedom.
Of course, law should provide for things like both parents having to contribute to kids expenses, or both parents being able to spend some time with their kids, but not go beyond that and try to make it hard for them go separate ways when they want to -that's overstepping.
Besides that, I would much rather grow up in a family in which my parents decided to go different ways rather than in a family where my parents would be together but not seem happy with each other.
There are some marriages that should end. There are men and women both who have no business being attached to another human being. But I think more marriages end than need to, and it's a net-negative to everybody involved (which means all of society). Learning how to live happily with another person (and it is difficult, no questions; I'm going on 20 years and it stays just as hard every year) is one of the most satisfying things you can do and teaches you many important lessons that positively impact one's life in areas outside of the home.