I feel like the whole fiduciary responsibility bit is always the foundation of terrible arguments. As if every individual choice that earns a dollar is therefore forced.
Earning multiple billion dollar fines is not serving shareholders. Sabotaging the future is not serving shareholders. Destroying goodwill is not serving shareholders.
Apple's various tantrums and desperate clutching onto their market hasn't remotely been beneficial for the company, and I'd argue it is a big reason the company has started plateauing. Like how Valve went from being a game maker to being a purveyor of gambling crates and keys, Apple is desperately pimping for every bit of rent-seeking and service fees.