The Fragility of the Human Body

What is the explanation from evolution why human beings are not like other apes? Not having fur, and so on?

To complete the argument, I would have to look at the necessity of shoes for protection. There are various peoples who still do not wear shoes and can manage without footware--but can they handle the same wear and tear that other apes can handle? Or are humans more vulnerable to injury in comparison to them? Perhaps the human body is not as fragile as we who live in rather pampered societies might think. Still, one wonders if it is easier to injure the human foot than it is to injure, say, the foot of a gorilla?

Nature equips us with a fragile body? Very little protection against the elements? Why not keep a more ape-like body, with more hair and fur, tougher skin and feet, etc.?

On the other hand, humans would not need protection if it came from another source? (From God, in the form of a preternatural gift.) If in comparison to the other apes we are weak and vulnerable, these facts, coupled with a proper argument for the wisdom and goodness of Divine Providence, might signal to the non-believer to some event like original sin.

Might it also be an argument against evolution? After all, if having a hairy body is still a benefit, what is the advantage of losing fur? It is not clear to me that hair would significantly impede the application of reason to various tasks, or confer a reproductive advantage. (Unless one wants to argue that humans who are less hairy are somewhat more sexually attractive, but if this is solely due to perception and does not involve a chemical signal, what is the mechanism? Those who have less hair would be at a disadvantage in colder climates, but in warmer climates... one can survive despite having a lot of body hair? How is hairiness selected for or against? And what causes thickness of hair? And the density of hair follicles?)

An argument against this might be that humans have intellects which enable them to fashion tools with which they can compensate for what they lack by nature (see Aristotle). But why should they lack the protective features other animals/apes have in the first place? Does it spur intellectual development? Create an incentive for the acquisition of some compensating benefit?

In science fiction one often sees a manifestation of the gnostic tendency coupled to evolutionary theory -- as humans become more "intellectual," or more evolutionary advanced, the weaker the body the becomes-- the mind becomes everything, the body nothing. (For example, the first sequel to the original Planet of the Apes.)