i am 2250 and yes i know quite a few high level players. to be fair not all of them are strictly specific about equipmentsAre you over 2200 or know a lot of people who are? You might be surprised how unaware many high level players can be about small details of equipment like this.
Hitting harder seems to me another way of saying "full activation of the rubber".
full activation is more about technique, not physical strength, as you might or might not aware
rubbers have different throws based on their sponge and pips combination. i was taught to choose equipment based on techniques, not the other way around
so, how to fully activate the equipment? only by proper training, not by hitting hard
hope that helps