The good news is...
...If either SpaceX or NASA succeeds in landing on the Moon in the next few years, these arguments will be over. Or maybe not, given the depth of conviction displayed.
The practical reason people haven't gone to the Moon in the last fifty years is because there hasn't been the political will to spend the money. That's a much less interesting reason than a conspiracy.
The Moon's surface area is roughly comparable to Africa's -- there's still plenty to explore there. Ice and other frozen volatiles, lava tubes, the lunar farside, odd features like Ina, just to name a few.
Incidentally, Apollo 16 did (allegedly) place a telescope on the Moon's surface in the shadow of the LM, as described here:
https://www.lpi.usra.edu/lunar/missions/apollo/apollo_16/experiments/f_ultra/
The SpaceX schedule includes cargo flights to the Moon in just three years, and if that happens surely a McDonald's can't be far behind (Lunar Lander game reference). With luck, in five to ten years we'll have either proof the Apollo missions landed as advertised, or a large selection of new CGI to argue over.