> Instead, Cupertino advises users to rely on the built-in features of macOS, such as limiting what applications have access to the webcam through System Preferences. It also suggests users keep an eye out for the green camera indicator light.
Concern about those things not being trustworthy/reliable is exactly why covers exist. Most RAT's include functionality to do it, and "oh it only affects Windows" isn't exactly a reliable risk-assessment, particularly when there are RATs for most platforms. Yes, Apple has mitigations in place, but the way you find out they aren't enough is retrospectively...
What Apple _should_ do, is design a sliding cover into future models