I don't know why this was downvoted. I don't agree with the post completely but I don't find it snarky or anything.

To the post itself: It's a bit more complex than that. If the kids mean a lot to you then splitting up means seeing them less, making the "trade" times stressful for everyone, etc. It's a trade off like many things in life.

But I do agree that there are times that staying can be more damaging than leaving.