This differential is critical to managing our core temperature, which is maintained by putting in more energy (running hot) and allowing processes (sweating, capillary dilation in the skin,) to cool off.
This is much more consistent and allows us to inhabit a much greater array of environments than things that are cold blooded.
Keep in mind, 98f is your core temperature.
Extremities are colder.
This differential is critical to managing our core temperature, which is maintained by putting in more energy (running hot) and allowing processes (sweating, capillary dilation in the skin,) to cool off.
This is much more consistent and allows us to inhabit a much greater array of environments than things that are cold blooded.