Legit don't know why you guys get so damn defensive about this. Either he'll play a long time or he won't but nothing anyone says on the forum is going to change that. And the history of 7'5" players and above. There's plenty of people under 7'3" that have had long histories, but that drops off a lot at Wemby's height. And yes, DVT was not a basketball specific injury, but it is also one with no margin for reoccurrence. If it EVER comes back, that's it. He'll be on blood thinners the rest of his life and he won't play basketball again. Ask Chris Bosh. This alone, makes hte likelyhood of a long career drop simply because DVT reoccurrence isn't exactly rare. Wemby has the best doctors at his disposal and it seems like he did indeed have the surgery, but if you're looking at this specifically from a statistical standpoint, the chances of him having another clot in the next 10 years are actually quite significant. Wemby's likely to have a much lower chance of reoccurance because he's going to have lower overall risk factors and he has the best doctors, but that was true PRIOR to his initial occurance and should still mean there is a significant chance of it coming back. You don't have to dismiss that. Obviously everyone here hopes it doesn't happen.
Second, he very clearly has physical limitations on his playtime. He plays a relatively limited amount of minutes for an NBA player of his age and his stamina is routinely lowered on the 2nd night of a BTB. You say he could easily be playing 38 mpg but I don't think that's true at all and I've seen no reason to believe that. That's you making up a bullshit data point with no grounding in actual data. He obviously takes good care of himself and he's obviously working very hard to improve this, but its been a consistent issue throughout his career. Maybe that just means he'll average fewer minutes throughout a long career but I am skeptical. There's medical studies out there that indicate that tall people have lower life expectancies. Organs are under a lot more stress when they are having to work within a system that is way outside the normal size range.
Wemby has all the advantages of being a professional athelete and modern sports medicine but that may or may not be enough to counteract physical reality. Most of us here are not doctors - well at least not medical doctors - but there are pretty clear indications.