It really isn't. There are all kinds of valid reasons to get divorced, from partners maturing in different directions, to one partner maturing while the other d

It really isn't. There are all kinds of valid reasons to get divorced, from partners maturing in different directions, to one partner maturing while the other doesn't, to drug and alcohol additions, to emotional and physical abuse. There are also selfish reasons, including boredom, finding more excitement - but not more depth - with someone else, and festering undiscussed resentment that financial and/or sexual expectations aren't being met. If one person goes down one of those paths and refuses to even discuss it, there's not much the other person can do. It's immature to expect a perfect glowing zero-conflict happy ever after. But it's equally immature to stay committed to something that is clearly dead and may be actively harmful to either or both partners - and perhaps the kids too, if there are any.