Made a mistake for sure, but "an inconvenience for hobbyists, and certainly not ideal for those that bought the things in bulk"? I doubt that. I don't think there'll be an awful lot of people trying to run it on their macbook charger, or if they do, that can't stump up for a PSU, and if they can't, that will really really want to get on their hobby-horse about it.
And if they do, I guess they can just return the pi for a refund, can't they?