WoA, another thing you'll hear around this forum and Alanon is that "marriage isn't a mutual suicide pact." Yes, we made vows, but so did our spouse. Personally, I believe that the "in sickness and in health, for richer or poorer" thing is in effect when BOTH partners are doing their level best for each other and for the marriage. It's NOT a "get out of jail free" card for one half to abandon their responsibilities and let the other half carry the weight.
Your POV may differ.