I dunno, they're pretty damn stupid too lol. Some of the things they do are absurd. Hens less so than roosters, but we're still talking about critters that will run into the same spot on a wall every day because they won't slow down at the place they'd be able to stop before they hit. And I'm talking months of it.
I love our birds. They're engaging, they can be sweet and loving, and despite not having wanted any pets again, I don't regret a single second of having them. But they are about as smart as bricks about most things.
Which is indeed more than what most people give them credit for. They're definitely not mindless. But they are very instinct driven.