Earlier quoted context omitted.
Yes, I agree with you. People are overall better off because of technological improvement, but making a living is harder (wages didn't grow with prices, modern life has more costs attached to it). Also families are much more unstable nowadays, with divorces being common. Children growing up in stable families do better in several parameters, therefore instability has a ripple effect on society.
Divorces aren't rare, but they also hit a 50-year low last year. This wasn't a COVID outlier, it's the continuation of a trend. Lots of reasons for this that don't necessarily undercut your argument though (e.g., fewer people getting married in the first place). https://ourworldindata.org/marriages-and-divorces
Is it really better that divorces are down when people aren't even bothering to get married before having kids?