The 'flat earth theory' is controlled opposition. The people pushing it are our enemy. This is how it's always used: Reporter 1: "These people believe [the jabs are dangerous/the 2020 election was stolen/9-11 was an inside job/(fill in the blank)]." Reporter 2: "Yeah, but they also believe that the earth is flat so..." It's a means of lumping the doubters in with the crazies; a means of dismissing anyone who questions the official narrative without having to address any of their questions about that narrative or any of their arguments against that narrative. The people pushing this nonsense, like 'Flat Plane 2020', are the enemy.