For one it means no one has a claim on the moon. And perhaps the tax payers has something to say about their money being used for a very expensive 'show'. And it can be nice to keep it in mind. For example when/if NASA or others try to convince people about a trip to Mars.
High production value videos were popping up several years ago, that always linked a flat earth perspective with 'that's why there was no moon landing'. It is quite an ingenious psyop to link scepticism, with a flat earth perspective. It has found its way into this forum which is an example of just how effective it has been.
These high production value videos did not just spawn by themselves. They would need funding. (Even the narrator is professional sounding in these videos). There are probably people who really believe in flat earth, but if there is, they are usually residing in channels with a low production value. What also happened as far as I know, is that real hardcore long time flat earthers has a website/forum that was rapidly invaded, and obfuscated, by new people, which also shows that this was not some natural growing support for a flat earth perspective. It was pushed along, and always with the 'that's why we did not go to the moon' agenda.
It also means that someone found it necessary to create this psychological operation. And that is likely because science, evidence, observations, pictures, etc all stack up to not be in favour of a successful moon excursion. And these things are easily shared on internet. But since this successful psyop, those do not readily have much value anymore. Since anything I or others say about it will now be countered with the produce of the psyop.
You put different things in a bag, labeled it religion, and presented that to a person who is talking about some, or one of them? Ok behaviour?