That only works if we pretend investors and customers are wholly disjoint sets of people who don't talk to each other, or are sometimes even the same person/people. However, they are/can, so we can't pretend they're working off different sets of information. How that affects the broader case; I'm not saying here, just pointing out that we can't really treat the groups as separate in this modern era. Especially since many shareholders/investors are that because they like the customer experience so much.