It hurts to walk on small stones with bare feet. Why does a person not feel pain if he walks on the same stones in the water?

Walking on small stones with bare feet is painful because the surface area is small, which means they put a lot of pressure on the bare foot. A person almost does not feel pain if he walks on the same stones in water because the weight of a person in water becomes less than in air, because the force of Archimedes acts on a person in water.
Archimedes’ law: a buoyant force acts on a body immersed in a liquid (or gas), equal to the weight of the liquid (or gas) drawn out by this body.