The only reason most people are enamored with NASA is because of a childhood space fantasy.
I rarely any defense of the US Government and others over lying to the people to get into wars, poisoning its people in illegal medical experiments (which they have admitted), or showing us phony inflation and unemployment numbers. Because your defense of NASA and Co. is mainly rooted in your fantasy, and it is otherwise generally conceded that the governments are prolific liars and sociopaths who have ulterior motives and countless secrets, is it a weak argument that government space agencies should be inherently trusted.
Based on all we know, government claims should be inherently distrusted.
No doubt governments lie, organizations lie, and corporations lie.
But, I think it a misguided rationale to therefore conclude that space travel must be a hoax.
- Aircraft Manufacturers such as Boeing lie and cover things up (e.g. the 737 Max controversy from a few years ago). Does this mean that jet air travel is a hoax?
- Auto Manufacturers such as Volkswagen lie and cover things up (e.g. falsification of their electric vehicle efficiency ratings from a few years ago). Does this means that petrol / electric vehicle travel is a hoax?
- In the early 1980's Milton Bradley released their Dark Tower Board game which a few years later went into litigation due to trade secret's being stolen from several independent game developers. Does this mean that board games are a hoax?
- Prior to Elon Musk purchasing Twitter, Twitter banned political figures (such as Donald Trump) because they said his speech violated their rules for compliance; it was found out later (as anyone could have predicted) that their internal algorithms and their political views were obviously bent against conservative viewpoints and to a degree Twitter tried to deny this. Does this mean that the Internet is an elaborate hoax and doesn't exist?
- Then, there was the Space Shuttle Challenger disaster of the mid-1980's. It appeared that NASA was so hell-bent on launching and bypassing safety protocols (with Morton Thiokol being an accessory) that their decision and push to space cost lives. But, this doesn't mean that space travel is a hoax. One could make the argument that it is because space travel exists that NASA felt pressure that day to launch in order to avoid another delay.
In the documentary "Behind the Curve", Bob Knodel was captured as saying "well, we weren't going to accept that" in reference to his Ring Laser Gyroscope experiment showing a 15 degree drift. Should one conclude that because he said "well, we weren't going to accept that" that there is a grand conspiracy amongst the flat earth community to cover up results? No, of course not. I think it was just a case of confirmation bias.
My view and opinion of the space travel conspiracy belief from flat earth members is that it isn't so much a belief that space travel is a hoax, but rather an expression of their distrust in authorities and science.