I've noticed a fun split among people I know—those who grew up on a farm will move heaven and earth never to deal with chickens again, while people who grew up in cities or suburbs are really into the idea.
Not an industrial farmer, but we had chickens, horses and goats growing up.
Chickens suck because they poop on everything, and it dries into a glue-like substance caked onto things. The straw ends up caked in poop, the walls get caked in poop, the floor gets caked in poop, the chickens poop on each other. Getting it off requires a paint scraper, and getting way closer to it than you want. It's also liquid-y. It's a lot like bird poop on your car, but bigger because the bird is bigger.
The horses were less bad. Their poop was fairly "clean" as far as things go. They stayed pretty structurally intact (it's basically a ball of half digested fiber, kind of like a hairball) so it wasn't a big deal to get them with a pitchfork, and they were almost exclusively on the ground. It's not a job I wanted to do, but it wasn't awful. The heat in the non air conditioned barn was honestly worse than the work.
Our coop is off the ground. All I do is bring my wheelbarrow up to the door, open it up, rake it in, and then go dump. From my POV it's one of the easier chores.
I'm married to someone who grew up on a chicken farm, have never so much as threatened to own a chicken, and still hear the litany of how awful chickens are at least a couple times a year. They're apparently really, really nasty animals.
Didn't grow up with chickens, but have had them for 8 years now. Easiest pet I've ever owned, and they provide eggs. Haven't seen a weed in the yard in years. They'll decimate a garden bed, though.
Grew up on a farm. Dealt with cows, horses, chickens. Chickens are by far the worst. Maybe bats would be worse. Happy to leave that as an exercise for someone else’s imagination