Wouldn't it make more sense that the fragility, lack of armor (fur/thick skin) or claws etc. Came after tools made them redundant, like how our bowels are shor

Wouldn't it make more sense that the fragility, lack of armor (fur/thick skin) or claws etc. Came after tools made them redundant, like how our bowels are shorter than apes' because they atrophied after the invention of cooking- a digestive system capable of processing raw good being less efficient overall in that new environment?