Do you believe human capacity is infinitely fungible and specialization is a myth? Because many communist regiemes already found out how they are not with comm

Do you believe human capacity is infinitely fungible and specialization is a myth? Because many communist regiemes already found out how they are not with command economic failures. Even if the specialization is misapplied reaiming them takes time - like how you start with training a battlefield useful longbowman's grandfather.