The wide variation of physical (and mental) types is what keeps us humans interesting. (Makes great fodder for storyteling, too: i.e. Fat Albert and Wierd Harold).
What will the control freaks do when they have hammered and drugged everyone into the statistical definition of ‘normal’?
The logical thing to do would be to designate a Queen. The only successful examples of socialism I know of are ants and bees, and the fact that all of the members of the colony are identical clones is no coincidence.