Please define your understanding of term "fundamentally". In particular, how can I differentiate between "fundamental difference" and "not fundamental difference".

Surrounding environment compels people to establish their diet preferences.
Difference in people's choices compels surrounding shopping environment to change according to people's choices.

Even though wise person might want to influence corporation as part of the effort, such influence should have much lower priority, than direct influence on consumers.
The reason for that is that in consumers-corporation relationships consumers define behavior of corporations much more than corporations define behavior of consumers.