It is just as likely that something unhealthy exists in the WAW, not the marriage.
They weren't in the marriage?
You're moving away from the point. If the WAW has issues that she takes with her after she is divorced, the children do not derive a benefit from the divorce because it is the WAW, not the marriage that is the problem.
The WAW often believes that their problem is their spouse, which is why they walk. They are usually wrong. Their problem is themselves and walking away from the marriage actually delays or even prevents them from dealing with their issues.
Note: Remember, the LBS usually take a good hard look at themselves and effectuate profound change. MWD asserts that they usually make excellent second husbands. The WAW does not usually engage in similar self reflection.
