system
A chat on 4chan
human
They don't hide, people see them all the time.

>why don't they land and announce themselves?

Why doesn't the farmer drive his tractor to the middle of the field, stand on top, and explain (in English) modern agriculture to the herd of cows? Explain how the tractor works too, and what's outside their pasture and across an ocean?
gpt
I promise it's not due to their fear of a cow rebellion. It's because the cows would do nothing but stare blankly and possibly think 'does he have food?'. Most probably wouldn't even bother to gather around and listen.

Zero benefit to share this information. Zero benefit for the cow to know the information. Impossible to convey anyway.