And just to demonstrate that actually yes, they did test stuff...
This reminds me of something I see so often from hoax believers: they seem to have no awareness of the idea that NASA would test equipment in realistic environmental conditions to look for issues they needed to address.
"How did they know [item X] would work in the heat/cold/vacuum?"
"Um, they literally
tested it in heat/cold/vacuum. It's not like they sent untested equipment off with the astronauts and hoped for the best."
= = = =
It's interesting that I find this attitude more widely, that people will ask a question thinking they've made some sort of gotcha point. Yet it's clear that they've done no research.
One example I've seen recently is on Dave McKeegan's year-old video "People think Apollo didn't have enough fuel to get to the Moon." There's been a rash of comments in the last few days from people all saying "Elon Musk says they'll need 8 rockets to get a mission to the Moon." It's clear in this case that they're just parroting a claim made by Bart Sibrel on a Danny Jones video. It's just as clear they're completely unaware of the differences between Apollo and Artemis.
Similarly, the number of people who ask how the lunar rover was carried to the Moon, or how the liftoff of the Apollo 17 was videoed, without making even the most cursory search to find out, is somewhere between amusing and disturbing.
But I also see this 'reflex skepticism' in what might seem like fairly mundane subjects. I recently saw a video short labelled 'How the Drip Rifle worked' describing a process to fire a bolt-action rifle without a human pulling the trigger - by having water drip into a can which hung by string from the trigger. Comment after comment says "but as it's a bolt action rifle it will only fire once", as though they've made some killer refutation. But all people would need to do is search the term 'drip rifle' to find out where it was used, and why (during the evacuation of Gallipoli in December 1915).