If their work is valuable, sure. If we can easily replicate accidentally (remember, design patents do not involve deliberate copying, but copyright does), then

If their work is valuable, sure. If we can easily replicate accidentally (remember, design patents do not involve deliberate copying, but copyright does), then their work isn't valuable to us, since we are able to do it on our on accident. And it appears that in this situation it's the designers pushing for this legislation that are charging a premium.