You'll be hard pressed to have your average person online casually use the Engelian type use of authority in authoritarian. The authority of work or authority of capital isn't what they're thinking. What is being imagined is almost always despotic tyranny.

Same thing with dictatorship. Most people will see that word and not associate it with a philosophical concept that includes a kind of rule by a class of citizens. They'll use it synonymous to despotic tyranny.

Outside .ml at least, and especially on .world.