The main thought portrayed by the scene deals with man's tendency to look at things as being similar, and not looking at things as being different. For one reason or another, many things are alike, but you can not, and will not be able to appreciate such things if you cannot find the unique characteristics. The scene also showed man's tendency to generalize, and group items and people. When we look solely at this grouping of similar characteristics, we overlook the differences. If we were all the same, life would be the same for all of us.
Difference is what makes our lives worth living.
Each and every person on this planet lives a different life. These differences compel us to meet others, and interact with others. Too often do we look at these differences negatively, and criticize others for being different. To live life to it's fullest, we need to notice and appreciate the differences in everything around us, yet our society is based on the similarities, not the differences. This makes life hard, and full of much unneeded pain.