Are astronomers and physicists just making shit up?

Let's be foreal, how do they know what is light years away or how far the observable universe looks like or how far it is, our space scientists talk about everything in space like they are sending exploration expedition ships to explore at light speed, what a plot twist would it be if alien exist and our knowledge on space is collected from their found ships and crafts and we are just here like we found this and that, I think they are just shitting everything out at this point, yea James web telescope is impressive but not that impressive, the thing will never leave our galaxy in any of our lifetimes nor your children lifetime or children's childrens lifetime, do any of y'all know or have solid information on how they gather information cause our history on space is a joke compared to what we supposedly know, we went to the moon and send some rovers to mars, and supposedly threw Katy perry to orbit on a cock shaped rocket, that's about it, for them to go like 400 million light years away there's a full planet made of pure diamonds, our neighboring galaxy is bla bla, no technology we have allows us to see anything related to our neighbor galaxy, these people probably in a room smoking pot going like "what if we tell the world that..."😂💀
Are astronomers and physicists just making shit up?
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