&gt; Everybody can learn plumbing too. Doesn&#x27;t mean the prices are going to fall.<p>Well, no, because &quot;everyone can learning plumbing&quot; is pretty widely accepted (and has been for quite some time), so the effect of that belief being accepted is already reflected in the current market price. (OTOH, the price is <i>lower</i> than it would be if it were widespread belief that becoming even modestly competent at plumbing required unusual innate gifts that most people lacked, and that attempting to learn plumbing was a complete waste of time for people lacking those gifts.)