I don't want them either (unless for some strange reason they sign for the vet minimum), but I think the fascination comes from the whole "potential" thing. It is the same reason people salivate over someone like Bismack Biyombo. Based on their resume (whether we are talking basketball skills, or injury history), the chances of them actually being on the floor in the NBA is relatively slim. But there is that chance that if things do work out, you could be getting a superstar, and those guys are very hard to find.
Its certainly understandable, particularly given how much the C's need more young talent to bridge the gap...but for me, the risk is too high, with such a low chance for reward.