As cockeyed conspiracy theories go, this one is kind of odd. After all, this story was published several years after the first successful ascent of Everest. Were we really supposed to believe that it wasn't really a successful ascent, that it was all faked to prevent "men's spirits" from being "crushed" by the "revelation" that there was really another peak "ten times higher" atop Everest?
That's some seriously Capricorn One stuff there, dudes. Next you'll have the Mysterious Traveler telling us that Phileas Phogg didn't really make it around the world in 80 days!
From Tales Of The Mysterious Traveler #5 (1957)