He has a much better opportunity to become a better player playing full-time professionally next year then playing on whatever we trot out there for the 2017-2018 season. Not really an arguable point.
If people wanna argue he may play himself into a top 13 pick then there may be enough financial benefit to stay but if not, from a basketball development perspective and from a financial standpoint he should go.
The numbers don't lie.
It actually is pretty arguable, but people want everyone to go.