For example, unrestrained sexual promiscuity spreads all kinds of horrible venereal diseases, which would be largely absent in a society that committed to stable marriages, instead.
Except even in the ones that claim to hold that value... fail
There are some very influential religious groups active in Western society which openly teach that good and evil, right and wrong are all just an illusion, a lie holding humanity back from achieving its full potential
they're right. It's how you impact others that matters. What you call or what you claim to believe about it is bullshit