Clothing, I would argue, is one of the things that
give a human dignity, and raise the human above an animal.
Work is another thing that falls in this category, as does not raping each other (some animals don't care). This is something that our ancestors understood well - look at how well they dressed despite the great economic difficulties in doing so for many of them. Animals don't wear clothes - and humans who get angry about wearing clothes make themselves animals, as do humans who despise working, or humans who attack people. These are fundamentally animal-like traits that we should be above.
Animals are not meant to be an inspiration for tolerable human behavior. They attack each other, kill each other, eat each other, commit incest, and so on. Just because an animal doesn't wear clothes, and that humans are a form of glorified animal, does not mean that it follows in any way that humans should be okay with doing the same.