Not as a moon-landing-denier, but as someone with an interest in epistemology: claiming thousands of people witnessing launches is not indicative of a moon landing, just a launch.
By staking the existence of the entirety of Apollo missions to something that is logically proof of a small part, the validity of the larger claim is diminished to someone who is not already invested the validity.
Don't interrupt grand nationalist narratives and proofs with logic. Especially when the proofs are in the form of cowboy quips from its heroes. You won't win.
This records 165 attempts including non-crewed missions of all types, like flyby of impactor. Of 165, 87 had some form of failure. 40 at launch, 32 at spacecraft and 5 partial failures. 32/(165 - 40) is .25, so about 3/4 of the time a moon mission launched, it succeeded. This indicates to me that "the rest of the trip is not that difficult" mischaracterizes the difficulty.
By staking the existence of the entirety of Apollo missions to something that is logically proof of a small part, the validity of the larger claim is diminished to someone who is not already invested the validity.