Why would any coach tell a starting player during a current season that they don't want them back next year? Don't start that.
There are tens of thousands of reasons for him to go start playing professionally. Maybe 6 figures after a few years? I'm not too familiar with different foreign leagues and their salary ranges.
Daniel Edozie was playing in England last I saw and having great success there. I think most anyone would agree that when Edozie was at ISU his ability ceiling was not as high as Conditt's.
Also, George had some good experience playing for the Puerto Rico national team last year. That could have started some conversations or opened his eyes to opportunities.
Unless he comes back and does some combination of doubling his rebounding ability, halving his fouls committed, and shooting 35% from 3pt range he's not going to improve his professional prospects.
And if he's got maybe 10 years to cash in on his passion and body he was given why waste 1 more year?