bob is going on vacation.
using your donated money, he bought a plane ticket, an expensive rental car, that you helped him rent, and a five star hotel room that you helped him book. you see all kinds of photographs of his cool awesome vacation online, but your friend bill is skeptical.
"he totally just faked the photographs and is spending your money on something else right now", bill says
"yeah, but i purchased the plane ticket.", you rebutt.
"but did you see him get on the plane???", bill says, confidently.
"no, but i heard airplane noises when he called me after they reached cruising altitude."
"he just put his phone up to a fan. bill would do that. he's sneaky, cuz one time he ate all the pizza even though he said he was going to save me a slice".
.you pull up a security video of him boarding, and the plane taking off.
bill says "there's no way you can prove he actually landed. he and the pilot were in kahoots and he landed again and let him off' before going on their way"
this is how you sound.
at the end of the day, the vacation still cost real money. even if literally everything was faked by bill, real money is still gone.
even if literally every photo and video from nasa is fake, real money still goes into building the satellite, real money still goes into building the rocket, real money still goes into maintaining the entire thing.