If you see humans responding to animals that don't use eyes (e.g. bats, insects) fuckups are a constant. We are very bad at interacting with anything that doesn't have something similar to our eyes to observe the world.
And third, the world has almost entirely been rebuilt to compensate for human observation flaws. It's not just staircases having a step height that works well with humans, but for example highway intersections have been changed 100 times until we found one that humans respond to in a manner different from slamming into the split. The same is true for many intersections (I first started realizing this when reading an article that an intersection with a bridge was modified because 5 people died when a car crushed them against the side of the bridge. It was redesigned. Now we find that an algorithm with an entirely different set of observations makes different mistakes ... not really that strange. Perhaps we should start modifying streets algorithms misjudge).
For example the warning cones for when you have an accident or road works or the like have also been adapted many times because version X was "causing too many accidents".
So in a bunch of cases it's neither that humans don't have big observational flaws or that algorithms have many more. It's just that we largely eliminated the human ones. Not by eliminating them from humans, but by eliminating them from the world.
Same is true on the inside of buildings.