It may be unfathomable in architecture, but it is very practical, or routine, for a person in theater to use action. You have the line, "Come home, son," but you can't play that line by going out and being a mother; you can't be a noun. But you can play to smother your son; you can play to grovel to your son. Again, the real information is carried in action. And, to an annoying degree, theater people talk to each other in infinitive expressions. If you don't have a vivid verb to describe what you're doing, you're probably going to be a pretty bad actress.