I was trying to see how many people actually refuse to press the handicap button, but if I asked it straight out, I think it would have skewed the response. I'm with the group that refuses to press it because I was gifted with two perfectly working hands and arms to push a door open myself.
Does it matter if my perfectly capable body wants to push the door open vs. pressing the big blue button on the side? It sounds like you're implying that by refusing to hit the button and opening the door yourself, you're in upstanding person looking out for the handicapped.
Could it be that the button doesn't work because perfectly able bodied healthy people push it every day so it is experiencing more wear than it should?
Probable but not at all likely. Unless this person is also bored out of their minds and starts smashing the button repeatedly, than sure. But regular people would probably just hit the button once or twice before moving on.
Personally, I never really hit the buttons. Not because I (pretend to) care about something as superficial as the wear on the button, but because I'd rather just push through the doors at my own pace rather than wait for them to slowly open.