The reason I think it's a good idea is that it makes the Celticsblog draft that much more realistic.
I tend to agree with Fafnir regarding the suggested injury situation. The CelticsBlog draft isn't realistic, and it's not a simulation. It's a voting-based projection based upon throwing a bunch of players together. It's meant to judge drafting prowess, vision, strategy, persuasiveness, etc.
To throw random chance into that just doesn't sound fun to me. No matter how skilled a player is, random luck can take them out of the game. Yes, that's more akin to the real NBA (to some extent, although injuries aren't completely random), but I don't think it's particularly fun. A GM can have a perfect strategy, pull off brilliant trades, and still get screwed because of a bad number draw.
I think this is one of those ideas that would sound good (to some) until it was actually put into practice. Then, when people had to participate in a game with no Dwight Howard or Deron Williams, they'd think better of it.
It's an idea that can be further explored, especially if there's a strong demand for it. However, I personally don't care for it. "Realism" is only so much fun, I think; it's the reason we don't use a salary cap and a CBA in this thing. Less realistic, certainly, but more fun I think.