I'm with you there, but prospects are a whole different ballgame, in baseball and to a lesser extent also in basketball. I think calling Masai dumb as f*** is harsh, because these are players that we as fans have much less exposure to than NBA players of which we have tons of video and data for, and know how to interpret said data.
I think your analogy about Josh Johnson is not valid in this case. We had data of him for years, all throughout professional baseball, we knew his injury history, we knew the guys we were giving up.
Just my opinion, I don't think it's the same thing at all.