Sean Parker: Facebook was designed to exploit human "vulnerability"?

Sean Parker, the founder of Napster and former president of Facebook, said this during the interview with Axios' Mike Allen Wednesday:

"That means that we needed to sort of give you a little dopamine hit every once in a while because someone liked or commented on a photo or a post or whatever ... It's a social validation feedback loop ... You're exploiting a vulnerability in human psychology ... [The inventors] understood this, consciously, and we did it anyway."