I sometimes hear someone argue that specialization has weakened society as individuals now have fewer skills with which to survive a calamity. This argument presupposes a sudden reversion to a rude state of society and that such a change would become permanent. This seems unreasonable to me as it assumes that we would not work to restore what we lost.
Of course, any person with skills suitable for employment in a more primitive society would be more comfortable until we attain our former level of development. Once this happens, this person’s skills again become irrelevant.
The question of how much time and other resources we devote to acquiring the skills needed to survive and thrive during a calamity remains unanswerable.