Suggesting a guy with significantly above average Krate, BBrate and K/BB as a starter in his rookie season does't need to spend three more seasons in the minors before he'll be a "mlb starter".....
Because, your new argument is a strange one. His size and stature would argue against his chances to even become a starter given major league tradition. Why would another three years allow him to pitch like he's got a better downward plane and the durability of a 6'2", 230 lb guy?????
What you did is what you do with all "prospects". You predict failure as a general rule while failing to consider specifics. That may mean you're "right" more often than not, especially with pitchers, but it's not a terribly informative stance and it certainly doesn't support statements like Harang will need to be extended if he's to be a rotation partner with Cueto.
You don't and it's not a strawman to argue that you don't.