this is an entry-level scientific mind, my friends. hey, let's not analyse claims and evidence through our logical faculties - but rather, obfuscate the issue into a 'why would they lie' matter. i'm not here to tell you why anyone would fake anything. i'm more interested in actual evidence, of which, for the spinning ball, i have seen very little.
Actually the question of 'why' is very important here, and your answer avoids the question. 'Why hide the truth' is a compelling argument against flat-earth nonsense, for no one has been able to answer this question to any satisfying degree.
The resources required to conceal giant ice walls and bribe airlines and shipping companies into silence is all to achieve... what? What is the endgame of this? Who does it benefit to keep what would be an obvious fact so secret? Especially over a sustained period of time?