I don't know how so many people can say he made a bad decision. Getting drafted may have been his only goal. Maybe he just didn't want college ball anymore. 2nd rounders make it in the NBA too. This isn't a death knell for him. Besides, mid 2nd round picks don't become lottery picks with 1 more year of college.
I personally couldn't care any less if a player leaves when he feels like leaving, so in the sense that he did what he felt like doing and it is far from a death knell, I agree. Having said that, the NBA is all about the second contract, IMO. I honestly think this is one of those things that people ignore that is really important. Rookie contracts are slotted and, relatively speaking, pretty mundane. The real cash comes in contracts two and three if you can get that far. The idea that you get drafted early is awesome, but the key is being really good by the end of year 3. I think for a lot of these guys, and grant is one, minutes and opportunity in college could have really helped them make some serious cash in the second contract. Sitting on an NBA bench or playing in the D League is nowhere near as valuable, IMO.