Once again, i am talking from a pro snooker perspective only, where conventional wisdom has shifted in recent years.
Perhaps you can tell me why the dominant players have fewest kicks? Are they sprinkled by the kick fairy?
Snooker and pool both involve round balls knocking into each other. I am talking from the perspective of physics. In physics, there is no such thing as "purity of stroke". There are such things as position, momentum, and angular momentum. As soon as the cue ball stops contacting the cue, the "purity" of the stroke becomes irrelevant, and all that matters is position, momentum, and spin. There's no quantum mechanics here, no "spooky action at a distance," we're talking about basic Newtonian physics. The cue ball doesn't have any memory of how purely it was stroked (beyond position, momentum, and spin)
Like I said, it's possible that some players use more or less spin, tend to hit harder or softer, or leave themselves thinner or thicker angles. All these things could affect how many kicks they get. There's also the slim possibility that some players strike the cue ball in such a way that it leaves less chalk marks, or maybe they chalk their cue less often. If "purity" translates into one of these, then it could affect kicks as well. But if it doesn't, then it won't.
It isn't voodoo, it's physics.