The irony escapes you. A mind that starts and ends with a conspiracy theory allows for no contradiction of beliefs by facts and evidence and no chance of exchanging error for truth. Which is how an open mind learns.
The closed mind is all yours. And you're clearly the one who needs the 'feelings' described below:
Believing in an alternative truth makes people feel smarter.
It makes them feel superior when they think they know something no one else knows.
And when someone tells them they’re wrong, a conspiracy theorist argues their opponent is not enlightened or involved in the cover up.
Feeling smart and being “in the know” is an important part of the appeal of conspiracy theories.