No we shouldn't. Not when most of our opinions are predicated on the fact that his future is lessened by the health of his knees. And having a nonchalant attitude about it isn't wise either. Yes it's football and everyone's health is at risk but we're talking about the RB position where the average career is drastically shorter than other positions.
Bottom line: Miami and now Philadelphia have both treated him with kid gloves in practice. He is a runner that needs a high volume of carries to wear down a defense. However, coaches will never rely upon a player who can't even make it through a week of full practice. Sell him now while his stock is high. You will regret it if you don't.