Did they spend half a season in an intensive program like Adley did last year?
You don't buy my if he's a bust argument? Can you think of anyone with Adley's pedigree that hit .650 in the minors and ended up amounting to anything in the majors? (No I don't count DJ Stewart)
I also don't think you, or I, can prove someone wasn't ready or not ready or if rushing them would have helped or hindered their development.
I've said it before, Brooks was up super early, was clearly not ready and he ended up in the Hall of Fame.
Folks can continue to develop in the majors, nothing magical exists in the minors.