Because of tribalism. Your tribe won't accept you any longer if you stray too far. Some people also really enjoy feeling superior to others, so they do whatever

Because of tribalism. Your tribe won't accept you any longer if you stray too far. Some people also really enjoy feeling superior to others, so they do whatever they have to in order to appear as such. These superior tribalists are usually the people who go around saying things like "I personally like small, portable, self-contained programs capable of running everywhere..." instead of things like "I like using the best tools for the given job so that I can better serve my users." Or, you know, he or she has an allergy to it - didn't you hear that part?