im not a "your draft position" immediately becomes irrelevant or your "prospect status immediately becomes irrelevant" type of guy ,but I get the argument.
I just lean towards once high draft picks/top prospects , even if they havent lived up to it by the time they are say, 25 years old (ish) - I still believe that in many cases the former top prospects/draft picks have a higher than most chance of regaining / breaking out.
Lot of those stories. Dude is expected to be a stud but struggles getting to the show and is close to being deemed a bust, but then figures it out, just took a little extra time.