Societies' gains as an effect of this specialisation is just one (albeit an important one) aspect of the whole optimisation. Anti-fragility and redundancy typic

Societies' gains as an effect of this specialisation is just one (albeit an important one) aspect of the whole optimisation. Anti-fragility and redundancy typically decrease the number of (costly) disruptions in a system and thus the proposed fallback profession might actually be a net positive for efficiency rather than a loss.