So, you choose not to address the grandparent's point about social stigma, and you want to add other 'optional' binding agreements which may themselves have social pressure pushing people to adopt them.

I didn't think the grandparent made any point about 'social stigma' worth addressing. But, to be clear:

• You don't have any right to your neighbours' good opinion.
• If doing X would upset (or please) your neighbours, your choice (not) to do X is still voluntary. It just means you're facing a trade-off. Welcome to adulthood.

More generally, I don't think that social approval/stigma are bad things. They are the glue that binds civil society together. I can't help notice that people when people speak negatively of social pressure, they never apply that critique generally. Should there be less social stigma against racism? Less social stigma against harassment? Suddenly, they're not so sure.

If you want people to find the process of divorce unpleasant, you can rest assured that most of them probably do.

Actually, my focus is on making marriage more pleasant.