Schalles' competition experience and achievement is well documented, up to the world and olympic level. He is in an elite class when it comes to his knowledge of down wrestling through body positioning, weight distribution, leverage and all the other important mechanics of wrestling.
I think they're doing the right thing having him focus on the pinning side of wrestling while he learns from the late Billy Robinson's assistant coaches - who collectively have had several thousand hours of direct coaching from Robinson - and there's a lot of overlap in what Schalles already teaches and what Robinson taught because Catch is a wrestling based art, and the forefather of American scholastic folkstyle and freestyle.
Schalles has never claimed to already be some expert in Catch, he has never sold what he does as Catch, so we get to see him develop into a Catch coach while working with others.