First, that's a myth. There is no legal fiduciary responsibility to shareholders beyond the basics required by the SEC (which does not cover anything to do with maximizing profits et al).
Second, Zuckerberg controls Facebook. He has less realistic responsibility to the shareholders than almost any other CEO of a big public corporation in US history. The dual class share structure ensures he is able to ignore shareholder concerns and pressure that most other CEOs simply cannot.
First, that's a myth. There is no legal fiduciary responsibility to shareholders beyond the basics required by the SEC (which does not cover anything to do with maximizing profits et al).
Second, Zuckerberg controls Facebook. He has less realistic responsibility to the shareholders than almost any other CEO of a big public corporation in US history. The dual class share structure ensures he is able to ignore shareholder concerns and pressure that most other CEOs simply cannot.