It's an analogue of rational market theory: no asocial choice can be rationalised as a good long-term plan so there must be externalities which are causative.

I don't believe in rational market players with full knowledge and equal information any more than I believe all violent men had externalities which were causative.

But I do believe poverty and epigenetic influences can exist.

Majority of criminals are from abusive or fatherless homes. That's the externality.

I believe it was sarcasm.

There's a surprisingly prevalent, but misguided, school of thought which asserts that disparities in outcomes across gender or racial lines imply sexism or racism. This concept is closely associated with the "tabula rasa" or "blank slate" theory[0]. Thomas Sowell wrote an entire book that debunks this idea ("Discrimination and Disparities").

[0] https://en.wikipedia.org/wiki/Tabula_rasa

I suspect the sarcasm went over your head.