My parents divorced because my mother was unhappy, they were young, and weren't thinking about me. It sucks that they divorced, but what can I do? Nothing. Just love life the way it came.
I believe divorce is a problem when it involves a child. No matter the situation, when there are kids involved.. the couple should try and work out their differences. Isn't that what marriage is all about? Going through life together, helping each other through thick and thin? Yeah, there are going to be some rough spots, but suck it up, and deal.
If the marriage is a condition in which someone is taking advantage of their marriage, there is abuse, or continuous adultry.. AND the couple has already tried to get help, but nothing works. Then that marriage is on the rocks, and needs to be dealt with properly by a divorce.