Evolution is irreversible. Each evolutionary change is a combination of many independently occurring and selection of rearrangements in the genotype. Therefore, a return to the original original type is impossible. It should also be taken into account that it is not individuals, but populations that evolve, not individual characters, but complexes of characters are selected, and whole gene complexes are controlled by selection.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.