I actually think cobs are ideal for beginners, because they are so forgiving, but I wouldn't call them a "beginners pipe."
Most of the myths that I find amusing fall into category: the myth that briar pipes are fragile things that require constant attention and pampering. You know - break in gently, only smoke one bowl at a time through it before resting it, etc. What BS! Briar pipes are tough -- they can take a lot of use and abuse. In my experience, the important thing is to keep them thoroughly cleaned and use common sense (don't use a churchwarden as a baseball bat or poker, don't clean them with gasoline, etc).