I don't think the 2 inches of height he's giving away really has anything to do with it. The wear and tear would have more to do with him being severely out-weighed and facing an uphill battle in terms of physical strength every night fighting for position.
Yeah, it's not about height ... it's about weight, strength and simple physics. This isn't a situation like hoping a rail thin guy like Nerlens Noel won't snap in two. TT is very strong and uses leverage generated by his lower body, but having a weight/strength advantage is an advantage when contact occurs - and it still occurs game in game out.
I'm not saying this is a big concern, just something to watch. For instance, let's see if continues to block shots at the same rate as the season drags on.