There's a very specific reason for this that can be illustrated quite easily:
The current Wiki page on authoritarianism: https://en.wikipedia.org/wiki/Authoritarianism
The same page, but from 2006: https://en.wikipedia.org/w/index.php?title=Authoritarianism&...
The Wiki 'definition' of authoritarianism has shifted quite radically in recent years. There's a line in the older page, completely scrubbed at some point, that's quite relevant: "Democracies rarely exhibit much authoritarian behavior except in transition to or from authoritarian states. Many (if not most) citizens of authoritarian states do not perceive their state as authoritarian until late in its development."
Recent history (that extends beyond just the past 2 years) has emphasized that the vast majority of people are perfectly fine, if not enthusiastic, about authoritarianism when they share the values of said authority. This makes it near impossible to criticize authoritarianism, in and of itself, because it trends towards immediate hypocrisy. So instead people criticize a system of values they disagree with, while using authoritarianism as a convenient slur to make the critique sound more noble and meaningful than a simple value disagreement would.
The same thing has happened to the Wiki page. The older page emphasizes quite clearly that the West has long since entered into the world of authoritarianism, but we don't want to imagine this could ever happen. So instead we've redefined the word in an effort to focus largely on the differences between the United States and "the bad guys."