In the Republic of Plato there is a virtue that is thought to be needed to the degree that anyone violating it should be put to death--that is the virtue that everyone should be involved in one profession only. But how would that work in a Torah area? First of all, no one is allowed to make money off of Torah. The fact that they do anyway just shows that they do not believe in Torah. They just feign belief in order to go along and get ahead. [If they can let go of their belief in Torah in order to make money that show they never believed in Torah in the first place.]But even for those whose learning of Torah is sincere, knowledge of Torah requires knowledge of the Seven Wisdoms. [This idea come from the Gra who said "A lack of knowledge in any bit of knowledge in the Seven Wisdoms will result that that person will lack knowledge of Torah hundred times more.]
