Ah, but it is untrue. The Torah is to be read to the assembly (gathered together) every seven years. One of the reasons enumerated by YHWH is so that the children born in the interim can hear the words of YHWH. So the Word is meant to be understood by a child. No doubt there is milk and meat. There is a deeper understanding. But to say that the "simple" cannot interpret what YHWH has said is against the very words of YHWH.
Actually, the Torah is is to be read on a seven tear Talmudic Cycle (Schmita), not read every seven years. Anyone who would tell you that Judaism does not have or need teachers (Rabbis) because the Torah simple enough for a child to understand is a fool.