Old people and art galleries

Why is it that the most senior of our citizens tend to act stubbornly and rudely, and refuse to understand the rest of the world? I'm afraid of becoming old, because of some of the plus65 people I've met. I encounter these people in the gallery all the time, and they get furious with me and refuse to listen, because they don't understand the exhibits. Today, I was walking through the gallery and setting up for a tour group, when this white-haired old lady, with a shiny gold tooth and really bad breath, stomped toward me, scowling. She demanded to know where the "art" was. She was standing too close to me, and she didn't ask nicely. Conscious of our image as a public gallery, I patiently explained that the exhibit was called Marking Time, about Saskatchewan artists. What I wanted to say was, "Listen, you old bat, you're surrounded by art! Look at it!" She leaned in even closer, and I tried to back up (invading my personal space is not allowed, I don't care how long you've lived on this earth), and she loudly said, "no, I want to see the art. The real art! Where are the pictures?" I was a little confused about this, since she didn't seem to understand that she was in an art gallery, and there's different kinds of art. I told her that we had this photographer in Gallery 3, that artist in Gallery 1, and so on. She looked around and said, "I want to see lots of art, lots of pictures, not this stuff. Where is it?" I finally directed her to the only 4 paintings we have on display now, realizing that she was not going to listen to anything I said anyway, and I wanted her away from me. She shook her head, muttering as she walked away. It annoyed me that she couldn't see the other forms of art around her, and that she berated me for something I have no control over. I don't like everything I see in the gallery either, but I know that it's a matter of taste, it doesn't mean the art is invalid. I wish I had said that I couldn't help her, that I had a job to do and she could figure this out for herself. But my boss would be proud, anyway.