You’ll notice I didn’t use the word happiness in my post above.
So you’re arguing with something I didn’t say number 1.
Number 2, the oft quoted 50% statistic is skewed high by serial divorcees (people on their 5th marriage). First marriages have about a 65% chance of working out. Divorce rates are also declining. The majority of modern, stable marriages last.
Number 3, Longitudinal studies from Harvard, Stanford, and Pew show married people report greater life satisfaction, physical health, and emotional well-being compared to their single peers.
Number 4, Marriage and family aren’t broken, our culture is.