I'm already known for not being the biggest fan of future projections. There is no way I'd consider Horowitz close to JDM at the major league level.
If we were still rebuilding, I'd totally be with you but we are in a "win now" window before Bo and Vlad extensions have to be factored in. Let Horowitz work his way into a full time role by starting as a backup/pinch hitter/injury insurance for the upcoming season.