My wife always randomly hits the up or down button, then gets upset if I explain why she should only pick the one she really wants. She forgets the next time. I think some people never really understand how elevators work.
See also: the keep open / close doors button. I had one building administrator explain to me we should add a delay of 10 seconds to the "quickly shut door" button because otherwise she kept getting her arm hit by the door. When I asked why we would add a delay to the button that's meant to reduce delays (why not simply wait for the door to close on its own, then?), and whether we should fix the sensor that prevents doors from closing if there's an obstacle instead, she just kept staring blankly at me. I don't think she understood me at all.
Again, some people simply don't grasp how elevators work.
Primarily this fixes the bug in the interface which is allowing the user to input data that does not match their declared destination. However, a second benefit is that you can then obtain per-user destination information, which is useful in capacity planning and currently lost in shared direction-only button pressing. Finally, you could usefully use non-floor specifications, ie. 'Ladies underwear', 'ACME Co.', etc.
This reminds me of my partner, who always sets car air conditioning to 50F (the min) or heat to 90F (the max) because she thinks it makes it get cold or hot faster.
And of course a few minutes later we’re freezing or roasting. She sees the temps setting as controlling intensity of cold/hot rather than just, you know, the temperature you want.
I've never been to China but wouldn't you learn quickly after getting in an elevator going the wrong way not to do that again?
The only exception I can see if there's way more people than elevators and you just need to get spot at all costs.