Small, unathletic, right handed. The vast majority of humans don't have the physical ability to hit major league pitching. The less athletic someone is overall, in general the lower the chances they can do it. In a world where it's so, so difficult to predict how a college hitter will do against MLB pitching, it just doesn't make sense to dump so many resources into a guy who completely lacks both size and athleticism.
I've mentioned this before but I saw him play live in Myrtle Beach when he was in A ball. They lined up for the national anthem about 80 feet from me. He was the shortest player on the team. He did hit a couple balls hard that night but also didn't look at ease in the box. Swung and missed a few times. I was apprehensive about him after that.