Now, either I am part of the conspiracy, or the manufacturers of the altimeters and the air traffic controllers are, or the theory is hokum.
Or you are telling lies. There is always that option. You'd hardly be the first 'astronaut', 'fighter pilot', 'Antarctic explorer' or 'deity' to visit this site. But for every fighter pilot we have about 500 liars. I'm not inclined to believe your fantastical claims, purely on a statistical basis you understand.
Then every pilot on the planet, private, commercial, military, are liars. Not one truth teller among them. This makes sense to you?