Our names are long and complicated because they are descriptive! You can infer much about a person by knowing their name. It is common to go by one's initials, however, since we do change our names to coincide with noteworthy changes in identity or circumstance.
Human names serve no such purpose; they are only sounds all squashed together, and have nothing to do with one's personality or occupation. Last week, I made the acquaintance of a girl who was called "heather". What nonsense!