the only way these kids are going to end the world is if they mean they will end the currant status que. so far we have a chef a gardener a beast tamer and an architect , again i get the feeling all these skills could be used to be deadly like making poisons being a battle master beast taming could be deadly in its own right and if you know how a building is built you know its weakness to bring it down
This story reminds me of a joke (dunno if it's just in our country lol) where parents say they will birth children that would become a doctor, a lawyer, an architect, an engineer, a businessman, etc. So that they won't have to pay for someone else to do the job when it's needed. Hahaha build a whole society lolz