Focusing strictly on shareholders (value) has been en vogue since the 1970s:
* https://en.wikipedia.org/wiki/Friedman_doctrine
Before that the general thinking was along the lines of:
* https://en.wikipedia.org/wiki/Stakeholder_theory
Somehow companies managed to survive and grow before the 1970s.
It's been in vogue, in circles, since the 17th century. We're not talking about for-profit structures here.
"Investor heterogeneity" is a thing.
There is no Platonic "shareholder" with one set of needs.