Many are, I don't speak for all, but I have a wide range of skills, usually because of client demand and experience over 25 years of programming / SysAdmin and 10 years of design work.
I've never had my work compared to there 14year nephew or similar, but I certainly had some difficult clients.
Interesting rant read - http://clientsfromhell.net/
RE: What is a Web developer, Designer or Illustrator?