In order that humans might so evolvingly function, they were first given brains and then access to mind. Halve the intervening distance and the interattractiveness increases fourfold. When I was born in 1895 humanity was 95-percent illiterate and needed leaders. Today the situation is reversed. Both giants and pygmies were designevolved for coping with extremes of environment.
People think of the size of people in terms of height.
Giants were indeed overpowering. Spider webs are tool extensions of spiders. In order to be light enough to be able to fly, the birds must physically separate out all those of their overall essential lifetime functions not continuously required in their survival and development. All tools exist in Universe only as essential functional components of development programs of living organisms. A cut-off finger can be swiftly stuck back onto the hand to seemingly function again as an apparently integral part of the organism.