Elsa Einstein says that it is difficult to be married to Albert Einstein. Does this seem likely? Why is it difficult?

Einstein is a stubborn man, and often too busy in his own thoughts to pay attention to the world around him. Elsa mentions that she has to "manage" him without letting him know he's being managed; this seems understandable, as he likely does not buy new clothes or show up on time for any appointment if left to himself.