well, just ask yourself, how many of your photos are taken at eye level?
Do you take pictures from waist height? Do you like squatting and getting up everytime to change the viewpoint? Do you like to take pictures from a higher viewpoint like over your head looking down on a subject?
I think live view is very impt as it helps to frame things from a different viewpoint. I have seen my pro photographer shoot many times from waist height when he shot my wedding photos in NZ, without a live view. he just shot blind with his camera at this waist height, but I think he is very familiar with his tool so it is allright for him. But I think it will be much easier with a good live view implementation.