Because, unlike plates, humans adapt their behaviour.

These worries seem quaint now: humans adapt.

Therefore, humans adapt their past experiences of things to perform experiments upon and test the pragmatic values of such experience.

As the stiffness of a surface changes, humans adapt by changing their limb stiffness.

When those groups function well, oriented by reciprocity and mutual care and respect, growing humans adapt to larger and larger circles of justice, care, and respect.