…but will have to be assembled from spare parts?
Anyway, we shouldn't dismiss the up and coming generation that easily. It took Ma Long quite a while to mature and dominate; he had quite a few losses before that by the same reasoning would be judged as a lack of mental strength.
That toughness is also an acquired skill, methinks. Hardening to the heat happens after repetitive exposure to the fire. I'm not sure about Lin Gaoyuan and Fang Bo, but would certainly not write them off, and as for Xue Fei, I believe he's in a position in which he has both the opportunities and the challenges of growth into the next level. He may be able to do so, or not; but that race is not run yet.