Yes, I believe you're interpreting that page incorrectly. Fiduciary duties are law bindings for specific relationships and situations not applicable for all publicly traded companies to all shareholders.
I believe you're confusing that idea with the theory of shareholder supremacy that's a claim, popularized by the likes of Jack Welch to support their actions.
The background comes from Dodge v. Ford Motor Co. in 1919 which stated
There should be no confusion... A business corporation is organized and carried on primarily for the profit of the stockholders.
and the interpretation has been quite debated.
This is a frustrating pposition to be in, particularly when few people are willing to offer viable alternatives in such threads.
I don't want to let a purity test be the reason I impulse switch to a less effective VPN, but don't want to indirectly fund things I don't support. Yes, money I spend on Mullvad might go towards shit I don't want, but what else is on par with Mullvad that doesn't have some other downside?