Or it can be as dangerous as helping a blind person cross a busy street. These specially trained dogs give their owners assistance, protection and love. Dogs have this special trait that I wished some humans had, they are not prejudice. They love people who love them back. Weather if you are handicapped, blind, elderly or whatever, they don't mind.
Some people shy away from handicapped or blind people just because they are different.
They didn't plan to be that way, the were just born that way. Dogs who help the handicapped and the blind, can't remove the handicap, they only can make the situation better. Besides that I see how a dog lights up the face of my handicapped brother, and I fully understand the power of dogs. You would have to experience it to really understand it, and believe their powers. The explanation of why people love dogs is as great as why dogs are so attracted to humans.