Interesting responses, given that
polling shows a majority of folks accept the alien hypothesis.
I don’t know who or what controls these things, but in the last two years the government has admitted they are real, releasing videos of objects that defy our current understanding of physics.
One or more of a number of ridiculously unlikely scenarios must be true for these things to be seen.
That is truly a Bigfoot urban legend.
There has been one or two films taken of a supposed Big Foot. And their provenance is easily questioned. There are hundreds of quality videos of the aerial phenomena; just the handful released in the last two years are enough to establish “probable cause” to believe something remarkable is going on.
They wouldn't hide themselves.
With the films released and acknowledged by the military the last two years, they’ve done a poor job of hiding. Some argue the fact we can see them is proof they are not alien: their technology would be sufficient to allow them to cloak themselves. But why not reveal themselves: we can’t bring them down.
What would we have to offer them? Nothing. They would be so far advanced from us,
We likely have nothing they need. But the curiosity we spend billions on annually for space observation/exploration might animate other species. What would a bug crawling on Mars or a mere bacteria have to offer us? Nothing much, but the day one is found, you will hear about nothing else.