"Really? Marrero over Zunino? And why wouldn't you want a Buster Posey? I get the possible injury concerns but one advantage of us going to the AL will be keeping him fresh by using him at DH. I mean it isn't set in stone that he'll end up like Mauer. The odds may be against him though."
My point is that I don't want to draft a guy as a catcher like that, and then have to move him to 1B or DH out of fear of his health. I'd rather take a great hitter who plays a premium position (like SS) and NOT have to move him away from said premium position to protect him.
IMO, when you draft an elite hitter as a catcher, you're either going to have to spend his career worrying and risking injury to him, which will heavily affect the lineup while he's out since he's a key offensive player, or move him to a non-premium position to protect him, in which case you might as well have just taken another highly-regarded hitter who played a different premium position (SS, CF, 2B, 3B) who won't need to be moved or protected.
There are exceptions of course, like a Bryce Harper who has the upside to be the best hitter in the game and could be a megastar at any position, so it's not a bad thing to move him, but Zunino isn't that kind of prospect. He doesn't seem to be significantly better or have significantly more upside than Marrero or other prospects in this draft class IMO.