We all know that the Jeters, Lincecums and Greinkes of the world need places to play getting ready for the big leagues. We all know those places are on teams with "roster filler" players, guys that are never going to fly on a plane to a ball game or hit for avg. above their weight. I've seen them as we all have.
The blanket statement that "teams (only) draft players they see in the big leauges in 3-5 years." is disingenuous, but sounds very good, if that's what you want to hear, sort of "scout speak" for the ignorant. However, if that was factual, there would be 10-12 draft rounds, not 50.
Then to use the disclaimer that only affiliated baseball execs understand anything, is bizarre. It ain't rocket surgery. The whole narrative sounds like someone who read an obscure book written by a crosschecker/scouting director and recounts the chapter entitled "Draft Day". I'm calling BS.