To play devil's advocate: A degree could open up opportunities that you wouldn't otherwise have. For example, it will be easier for employers in a foreign country to get you a work visa if they are interested in hiring you. Also, while a degree won't make a difference in the game industry, it will make a difference outside…
Yes, a degree will open you the doors to relocation, and obviously most non-art related jobs do require a degree to get in. I don't know if Mop was being sarcastic? I mean most of the TDs I have seen were artists in the past, and rather good ones. At some point they had an interest in scripting to speed up their workflow…