I find this commentary ridiculous and I'm not alone in that. The Economist again has a blog post up on this subject. They quote Clive Crook of The Atlantic when he says, "Apparently it is a great idea to elect a president who is calm in a crisis, except when there's a crisis. Then what you need is somebody to lead the nation in panic."
The President of the United States MUST do more than one thing at a time. I am frustrated with people who complain about the optics, but have very little in the way of criticism for the substance of the government's and the president's reaction. Serious problems demand serious people.