It's not about using it properly, give a chinese player these soft rocketships and the results would be the same, they never used them on the forehand, they would be in Dima's shoes.
Give Dima long pips and the results would be even worse. It's a different type of rubber, if you're used to one thing for decades, how are you supposed to do something completely different just as well?
It's like telling an auto driver to just jump into a bmw rally car (that is rear wheel drive and manual), and expect them not only to figure out how the car works, but also beat the trained rally drivers that have been doing it for years. And of course do that while in the mud, pouring down rain, not exactly a walk in the park.
More like a personal invitation to meet a tree or a cliff...
See the analogy? Give the rubber to a beginner and he's going to learn it properly and without pressure. Put pressure on them and watch them grow, push them too much and watch them fling off the side of the cliff and into a lake. But there's a difference between giving them a tenergy or a 600hp bmw, and a hurricane 3 or a 300hp subaru. One will k*ll you, and the other will help you.
(as for the car analogy, bmw is rear wheels, subaru is awd, half power, double grip, similar to tenergy and hurricane, hurricane has more control and spin)