You should never make a blanket statement like "you don't abandon family." There are many situations where the best (and only) option is to get away. This includes both your spouse and your family. Abuse is one obvious example.

I'm not saying that we should run away at the first sign of mental health issues. I just think that there are plenty of situations where it might be the right decision. It's obvious in extreme cases, but the decision will always be extremely difficult.

For what it's worth, I think most people view their spouse as "family". It's hard to imagine a different arrangement.