Well, my mother used to work for Neil Armstrong @ the University of Cincinnati.
When he came to work there , she and all others were warned not to mention the moon or Apollo 11 to him. She said, they [her bosses] never explained why, and when it was asked of them the question was just ignored. Later it was explained to her that he just didn't like to discuss it ?? As such she never asked him about it.
I picked her up @ the office one time, she said I'll introduce you too him when he comes through , but do not mention the moon, or any of that ........ OK
She did introduce me, he was a very polite man and had all nice things to say about my mother.
While I do think the lunar landing happened , I do not / did not, understand his silence about it ?