To Begin....The Handicap Button

I'm sure everyone has seen one of these.  Yes, this is the handicap button.  Now, the little dude with the half of a wheel coming out of his butt is the universal sign for "handicapped."  You have to have a tag which matches this little guy to park in a parking spot with one of those icons. The bathroom stalls with this icon are SOOOOOO much better than the ones that don't have them.  (Larry the Cable Guy calls them the "Cadillac of poopin' stools).  All-in-all, you would have to be completely backwards or from some civilization in the deep Amazonian jungle not to know what the heck this wheeled buttocks man means.
  Which brings me to my point:  Why is it that everyone EXCEPT those for whom this button is designed use this thing? Where I work, the employee entrance has one of these buttons to open one of the double doors.  I totally understand situations where someone who may not be handicapped may need to use the button.  I worked as a delivery guy under two different capacities (Edutek and Loomis) and there are just times that you can't open the door yourself, and there is no one around or the people around aren't courteous enough to help you out.  For this, I have no problem with a "non-handicapped" person using the handicap button.  However, where I currently work, this button seems to be the only way people can get into this building.  Every day I see perfectly capable people waddling their way into work and, with nothing hindering their hands or movement in any way, press the handicap button for the door to automatically open for them.  REALLY?! Is society getting so automated that people don't know their own potential in opening a door? It's not that hard, the freaking breeze can open a door, so it shouldn't be hard for you people. 
   Here's a prime example of the ridiculousness witnessed:
     One day, while walking into work, I saw something that still baffles me since it happened.  A woman was headed for the door just in front of me. Keep in mind that the most cumbersome item she was carrying was her purse and she didn't appear handicapped in any way, well, not at that moment.  Someone just before her had pressed the handicap button, so the door was already opened.  Well, as this woman approached, the door began to close.  She rushed to try to beat the door before it closed, however she wasn't fast enough.  What happened next floored me. Rather than just open the door manually, considering she was already at the door, she TURNED AROUND and went back to the handicap button and pressed it!!!!  Much to her chagrin, the door didn't open when she pushed the button.  The look on her face was one of someone who had completely run out of options and didn't know what to do then.  It honestly wouldn't have surprised me if she called in sick for work.  All I could do was shake my head and walk through the door like any normal person would/should have and left her to her defeat.
   Come on people, it's a door, not Mt. Everest.