With all of the science put aside, the big topic for me is the conspiracy itself.    Not just that round Earth is a conspiracy, but the incredible complex scale that is necessary to pull it off.  A singular event such as 9/11 or an assasination, I firmly believe  can be pulled off and have the masses fooled,  but “round earth” conspiracy is a continuous world encompassing endeavor that has to span generations, governments, religions, and science at a scale that gives me a headache just thinking about.