He’s our top catching prospect. We aren’t trading him.
"Our top catching prospect" doesn't mean he's an objectively good catching prospect. He's not high in any organizational top-10s that I've seen, which puts him alongside guys who grade out as fringe major leaguers. A .593 OPS and 25% K rate at Hagerstown - even at 19 - puts you in that band. Nor is he anywhere close to MLB-ready.
So there are only a couple reasons to have him on the 60 - a warm body as a catcher in camp with injuries and suspensions, to keep him playing against good players (even in sim games) in what would normally be an important developmental year, or to trade him. But it's pretty absurd to categorically rule out trading him. He's a lottery ticket prospect, exactly the type of dudes who get traded for relief pitchers all the time.