We define ourselves as intelligent.
That’s odd because we’re creating our own definition.
“We are intelligent!”
Would another species say that about us? [One] that calls themselves intelligent?
Look at the genetic difference between us and chimps. It’s very small (less than 1%). But we say, what a difference that is!
We compose poetry and have philosophy and have music. All they can do is put a stick in a termite mound.
If you can find another species that has that same 1% difference in DNA beyond us, that we are beyond chimps, how would we look to them? Our smartest humans would do what their toddlers can do. And it’s not clear that they would view us as intelligent at all.
Perhaps we’ve never been visited by aliens because they had looked upon Earth and decided there’s no sign of intelligent life.