That is such a weird analysis. Flat out weird. Have you seen Drummond play? There's no evidence to suggest his frame can't handle his weight. He doesn't have the injury concerns Oden had. He's 7% bodyfat which doesn't suggest his joints are suffering from carrying a bunch of blubber, where sub 9% bodyfat is when you get into permanent six pack territory, which means a 6 pack without flexing, or 24/7. Most extremely lean, muscular guys don't have joint/ligament problems due to their weight. It's the guys who put on fat everytime they stop working out and their weight constantly fluctuates that have the problems as their body structure keeps changing which makes life tougher on your joints/ligaments.
Would you say the same thing about Lebron? He came into the league at 250. Obviously at 18 he wasn't fully developed and someone with your perspective could have argued he would balloon up to 270, and as a SF his body would break down. Well, he's never had a serious injury and has played above the rime and an enormous amount of minutes for years.
But looking closer, Lebron now is about 260, on a 6'8" frame. That equates to 3.25 lbs per inch of height.
Drummond is 278 lbs on a 6'11" frame, or 3.35 lbs per inch of height.
Drummond is carrying an extra 1/10th of a lb per inch more than Lebron, which is basically nothing. Similar builds as well. I just don't see the issue here at all and wonder how you even came up with it. Never heard anything like it when talking about a guy with 7% bodyfat. With such low bodyfat and a substantial amount of muscle, and also considering the fact he lost the 22 lbs relatively quickly, it's not too hard to continue to train and cut off another 10-20 lbs aiming for endurance/explosiveness rather than size/power, which would allow him to basically lose more weight, maintain the 7%, without losing his strength and also seeing improvement in other areas. All just my opinion of course, but I just don't see this being a concern.