Possibly true, but at the very least you are missing a key ingredient in the loosening of sexual mores over the past 60 years. A world with today's technology but the sexual conventions of the 1950's might apply those efficiencies towards the creation of happy marriages, rather than the creation of... whatever we call the webs that we have today.
https://www.researchgate.net/publication/11011072_Changes_ov...
Those all sound like positive things to me. How are you correlating marriage success to these changes? If anything I would think those who decide to marry would be less likely to encounter sexual compatibility issues if they were able to openly discuss their needs with one another.
Statistics appear to show that these changes may be leading to lower divorce rates, it also appears that divorce rates are highest among those from previous generations. The rates still seem highest among those who married early in life, but less people are marrying early now, which seems to be helping.
“Dating apps are popular in Iran, but from now on only Hamdam will be legal.
Iranian law also criminalises consensual sexual relationships outside marriage.
According to Hamdam's website, users will have to verify their identity and undergo a psychological test before they start searching for a partner.” [0]
When a match is found, the app "introduces the families together with the presence of service consultants", who will "accompany" the couple for four years after their marriage.
Weren’t many of the 1950s housewives taking amphetamines and antidepressants to cope?