The point of a series like this is to tell us something about the nature of the society we live in. The most obvious point is that most people do nothing practically in their everyday lives which would be of value in a post apocalyptic world. Indeed those who do carry out practical work are derided by those who hold power.
We have among us immigrants who would thrive in the 'Survivors' scenario. I would pitch in with Sri Lankans, Zimbabweans, Australians, New Zealanders, Poles and others from a peasant or mining background before I looked for any help from someone from Hampstead. I'm off for a bike ride now, I've got to fit a new clutch to a chainsaw when I get back. I might check the generator and my petrol powered drill as well.
Damon.