It's not so much the hand, more like the red.
I mean, red pretty much means no or stop or don't do it, right?
Is there a country somewhere where red means yes?
And just how long does it take to figure out when to cross?
Look at the other people, look at the cars.
It's just laziness.
It's like people who keep mixing up "its" and "it's" and "your" and "you're".
It takes roughly two seconds to figure out which one is correct.