My OPINION is that he will have a long career, because he has the right combination of attributes [good size, NBA athleticism, strength, decently refined offensive game, shot blocking, good attitude, hard worker, range on his jump shot, etc.] to make a team and stick in the league. I believe he is a better player at this respective stage of his developmental curve than Etan was [a similar athlete] when he got drafted, and Etan went on to have they type of lengthy journeyman career that I believe Rak could match or exceed.
I'm comfortable owning that prediction, even though I recognize that there are many factors that could prevent that from happening. Yours is that he "lacks what it takes." We'll see how it turns out.
Edit: and I just can't let this go. Please elaborate on all of these bullish predictions on the likes of DNic, Rick, Southerland, Kris, and Damone. Give me a break--I'd be surprised if there was ONE bullish prediction on ANY of them. I recall posters being hopeful that some those guys might find a way to stick in the league--for example, that DNic might have done the one thing [shooting] well enough to latch on, that Rick might have been a good enough rebounder, etc. But I seriously doubt that ANYONE was bullish about their prospects. Certainly not Damone, Andy, Southerland, et al. C'mon.