An upright hominid could see better, but could also be seen better. Even now as a species, we are almost preposterously vulnerable in the wild. Nearly every large animal you can care to name is stronger, faster, and toothier than us. Faced with attack, modern humans have only two advantages. We have a good brain, with which we can devise strategies, and we have hands with with we can fling or brandish hurtful objects. We are the only creature that can harm at a distance. We can thus afford to be physically vulnerable.
Upright hominids gained advantages such as improved vision, which allowed them to be more aware of their surroundings. However, this visibility also made them more noticeable to predators. The vulnerability of humans in the wild is evident, as most large animals possess greater strength and speed. This contrast highlights our precarious position in nature, where survival is not guaranteed.
Despite these disadvantages, modern humans compensate with intellect and dexterous hands. Our brains enable us to develop strategies for protection, while our ability to manipulate tools allows us to defend ourselves from a distance. This unique capability makes our physical frailty somewhat less critical, showcasing the adaptive nature of our species.
