They really aren’t. There is no such thing as an RNG, we either seed initial values or we base it on a natural phenomena that’s so complex that it’s seemingly random.
https://www.reddit.com/r/askscience/comments/781ujb/what_is_happening_when_a_computer_generates_a/
I can keep going. This is a clearly documented subject by people way more qualified than any of us to be talking about the subject not some weird personal opinion. I don’t represent personal opinions as facts, if I say something is true and insist it’s because I’ve done the research.