No argument that it helps - and I vastly prefer working with folk in that mode. But I've also worked successfully with great visual designers who figure out th

No argument that it helps - and I vastly prefer working with folk in that mode. But I've also worked successfully with great visual designers who figure out the medium's constraints without knowing CSS/HTML - and bring other aspects to the team (e.g. great user research skills). I'd be a fool to reject them just because they lack HTML/CSS. I just pair them with somebody who does. They both learn.