My friend Ed says he sees "carpenter" as a providential trade for Jesus to have had, because it would have given his the physique necessary to withstand the rigors of his last 3 days. I think farmwork would have done just as well. But of course a carpenter,as small tradesman, may deal with many other people (including farmers, fishermen, Romans, rabbis, housewives) and thus add to his store of human cultural knowledge, admirably suited to parable-telling.
So I am gladly corrected!
I am rarely gladly corrected, so you have the advantage of me!