The level of zombies is related to the average strength of humans. The stronger the average strength of humans, the stronger the zombies will be.
Therefore, in this lifetime, Wang Tao did not intentionally boost the power of other survivors, leading to his level being higher than that of the zombies. His personal combat power is likely the highest in the world.
But even so, Wang Tao is not strong enough to protect all survivors on his own, so other human survivors must have some self-defense capability as well.
Mechanical exoskeletons or even powered armor are very suitable for humans. Because these belong to external forces and are not part of human strength, no matter how much external force is enhanced, it will not make the zombies stronger.
