I think this is a gross over-exaggeration, otherwise dark patterns wouldn't work at the magnitude (majority of the buying population) they do.
I say this not disagreeing with your point:
> We have to escape this mentality that anything that makes money is valid, that the money itself is the validation of "rightness".
"Average" doesn't necessarily mean half way between two extremes - the average human might actually be all of:
- extremely vulnerable to manipulation
- struggling with impulse control
- prone to making bad financial decisions
- the elderly / kids (<16/>60)
Based on age demographics, rampant consumerism and social media addiction, especially in those age demographics, I'd be more inclined to guess the average human is all of those things.