What are some examples of 'common sense' which are nonsense?
Wikipedia defines common sense as "knowledge, judgement, and taste which is more or less universal and which is held more or less without reflection or argument"
Try to avoid using this topic to express niche or unpopular opinions (they're a dime a dozen) but instead consider provable intuitive facts.
There's no rationality to it. I don't get out my calculator and graph paper to plot out the best possible course of action. I just push the button a few times. And sometimes I push it a few more times.
If I didn't do it then I'd be thinking about doing it.
I'll interrogate my inner experience next time I'm standing at the lights, and I'll report back if I discover anything interesting (unless it's really damning information).
I'm in one of those places. In Utah, many crosswalk lights won't turn on at all unless you press the button, and the button can completely change the light timing and ordering (e.g. a protected left turn light activates at the end of a cycle instead of at the beginning).
Traffic engineers here are sometimes allowed to do some fairly interesting things.
I don't have evidence, but I have heard there are also times of day when it's automated and when it's manual. So you might need to press it at midnight but not during rush hour. Interesting if true.