"You need that guy like a giraffe needs strep throat"

This quote by Ann Landers is a funny way of saying that somebody does not need something or somebody in their life. It indicates that the individual is not required and that their existence is not advantageous. The contrast to a giraffe having strep throat is an exaggeration to stress the point that the individual is not required. It is a funny method of stating that the person is not required which their existence is not useful. The quote is a suggestion to not take things too seriously and to not count on someone or something that is not essential. It is a suggestion to concentrate on the things that are very important and to not lose time on things that are not useful.