Truth,
In many cases its possible to work on the individual while in the marriage. Some situations are toxic to the spouses and they need to leave to work on it. Sometimes one spouse can fix the problem but the other can’t. There are many variables.
As to money being one of the biggest stressors in marriage – how can it not be? I’m not talking about luxury, but when you can’t pay your basic bills, how can parents not be stressed out trying to figure out ways to earn more money to pay their basic bills? Life is expensive. That’s not bad middos – its wanting to avoid living off of tzedaka!