Objects that do not fit are a distraction. It is the job of the photographer to send a preparation list to the client before the shoot.
This is true for any company with a product that they are selling. How a company shoots their products impacts how customers perceive the product.
Ask on any photo-centric forum, Facebook group, or Flickr page what they think of verticals. Ask Scott Hargis, Rich Baum, Nathan Cool for their thoughts on verticals. The resounding answer is the same: line up your shots. There are no excuses.