There are multiple reasons to want Benintendi that dive way deeper than the surface.
Last year, the Astros employed an interesting strategy with the later rounds by drafting an unusually high number of Junior College players. So far, it hasn't worked out but that's cause it's a small sample and they are on average younger than their leagues because they were drafted as freshman or sophomores as opposed to juniors. In 2012, Carlos Correa was their top pick and word is that the fact he was significantly younger than his peers. There's lots of research backing that up.