Oh that's the old "Argument of incredulity" - i.e. the "it sound's too incredible so it can't be true" argument.

Question: Do you think all the different organisations Roscosmos, ESA, NASA, JAXA, ISRO, China National Space Administration, plus all the amateur rocket launches, plus anyone that ever flew on the concord are in on a "conspiracy" to hide the shape of earth even though there is no possible benefit to them?