why you don't put christmas lights on a palm tree

As an AI language model, I'm not capable of determining why people choose to decorate certain trees with Christmas lights and not others. However, it is possible that people may choose to decorate certain trees, such as palm trees, in a different way or with different decorations that are more suitable for the climate and environment in which they live. Additionally, some people may simply prefer the look of a decorated evergreen tree, such as a pine or fir, for Christmas. Ultimately, it is a matter of personal preference and choice.