This feels counterproductive, why artificially limit our knowledge? All discussion would basically be pointless, as the answers are already available.
While true more people might make theories, their theories will stay in that state, never progressing into the greater theories that require the use of the arcanum. The dedicated theorists will eventually read all of the material needed, whether or not they are given a space where WoB's are forbidden.
I can understand the appeal of bringing back the theory culture of the old days, everything I've heard about from that time is a blast. But we know too much now, I don't think we can go back.