I get that you alone have probably an insignificant amount of control, but forming a coalition would allow you to make change.
I’m aware that there are asset managers. Whose assets do you think they’re managing? Yours!
Do you own VOO? Awesome, that’s why Vanguard owns 10% of almost every large cap company.
Take control of those shares and go make change.
Look up John Chevedden. He owns a minimal amount of shares in companies where he causes huge changes. They call him the “corporate gadfly” [1]
Don’t be lured into thinking that you have to invest your money into a predesigned portfolio because it maximizes returns. If you care about control then maximize control. You already have the power!
[1] https://www.sec.gov/comments/s7-23-19/s72319-6733874-207512....
All or nothing fallacy. People have VASTLY different degrees of ownership, and this is reflected in their degree of control.
> Nobody is stopping you from creating a coalition of similarly minded shareholders
Such coalitions already exist. They have names like BlackRock, Vanguard, and Fidelity Investments [1]. Good luck competing with them. Especially if you abdicate your role in democracy, don't agitate for legal change, and restrict yourself to only market-based means of change (not BlackRock and ilk though - they use every lever available to them, they don't handicap themselves).
[1] https://en.wikipedia.org/wiki/List_of_asset_management_firms