I think the fear or caution is noted for inexperienced quilters, of which every single one of us has been at one time. I know that I struggled and was frustrated with bias edges at one point, and I did not know why I couldn't get my seams and points to match. If someone had pointed out that I was dealing with bias edges and the possible consequences of not managing them properly, I would have been a lot less frustrated!
Now that I'm more experienced and knowledgeable, I agree with Watson - bias can be your friend.
