It's not me that has this, it's everyone.
How does a person learn the meaning of a word? Usually they learn it just by listening to it within a certain context and then reaffirming this over a number of years. That's how kids learn their native language.
When dictionaries can't all come up with the same answer, how are people going to?
Then when you're dealing with such things like "Communist".
Let's see.
The USSR said it was Communist.
Communism - Wikipedia
Wikipedia says Communism is "a socioeconomic order structured upon the common ownership of the means of production and the absence of social classes, money,[3][4] and the state."
Communism | Definition of Communism by Merriam-Webster
"a totalitarian system of government in which a single authoritarian party controls state-owned means of production"
Wow. So, wikipedia is saying an absense of state, Merriam Webster is saying an authoritarian controlled government. The exact opposite of each other.
"a final stage of society in Marxist theory in which the state has withered away and economic goods are distributed equitably"
But also contradicts itself with a state which has withered away.
Then you have plenty of Americans who's definition of "Communism" is "bad" or "unAmerican" because they have no idea what Communism is, they just know they don't like it because... well because someone told them it was so.
This is how humans communicate. As you said, Humpty Dumpty style, though I rather think Humpty Dumpty is a little more organized.