I think a lot of people get wrapped up in vows and fairytales believing that a spouse is going to support you in good times and in bad. I say it all the time on here relationships are about value. Unemployed, lazy and depressed are not valuable. Throw in social media where it is perceived that everyone is living their best life. The resentment builds and it's only a matter of time until the plug is pulled.
In good times and in bad is one of the biggest lies ever told.
Not to hijack - but i believe if one successfully DBs, even if they end up D, they are holding up their end of the bargain, "for better or worse".
This is the "for worse" part. How you choose to move forward dictates whether you hold up your end of the deal. If the best thing you can do for your S is to let them go be happy, then that's how you can support them.
