Coming from someone who is engaged to be married for the first time this Fall, I think it depends on how it ended...
To me, marriage is a physical and spiritual connection, after all, we become one under God once we are married. It opens the door for two people to create a firm foundation for family making aka having kids.
If say, a women marries a man who was false about who he was, and once married, he lied, cheated, ect. Yes I am sure it would be hard... My mom is friends with a women who is on her 4th marriage. While, I don't agree with why she left any of them, she still had to courage to go thru it again, and again, and again, and finally, once more.
Also, I know two people, my fiance's mother and her boyfriend (His step dad) who were both married once and vowed to never be married again. His mother went thru an abusive marriage at a young age. Her husband was an alcoholic and abused her. She had every right to leave. My fiance's step dad, on the other hand, had a wife who cheated on him, with not a man, but a woman, and to me, that's enough for a man to feel marriage is the enemy.
We can't look at marriage as being at fault for what happens, if a marriage should fail. If people don't connect on a spiritual level in any aspect, I can tell you right now, it wont last. Many people ignore this and become selfish in their own hearts and marry that person anyways and 9 times out of 10 it fails.
I am no expert on the matter, but I think one can't blame marriage for a failed relationship when the rock wasn't firm in which two people stood on.
So is it wise, it depends on the approach, but love doesn't always have knowledge. In speaking, Love is blind, we have to rely on a strong heart and follow our own beliefs instead of settling for someone else's. When we settle, we fail.