Okay, you've skipped the part where I asked you if you performed cardistry enough to know its effects but...anyways...
Learning piano teaches you stretch your fingers and use them in unusual ways, as well as developing the strength in the hand muscles to apply pressure in directions most people are not used to
That's...that's exactly what...well, anyways...
See, if I never learnt piano, but I used a finger exercise routine to help me stretch my fingers...wouldn't it help me in the same way? I am omitting how a piano helps both hands function independently to some extent. Why? Because even that could be achieved by say, learning how to touch type. So, a combo of finger exercises and touch typing helps in the same way as playing piano does.
And that stretching and dexterity will help in doing the Rev cut to some extent.
So PLAYING PIANO did not help make Rev cut easy...STRETCHING fingers and WORKING SOMEWHAT INDEPENDENTLY with both hands did. The DEXTERITY DEVELOPED AS A RESULT of playing piano has helped, not the playing of piano directly.
You always try to have it both ways so you never appear to be wrong, but in so doing you are at best confusing new learners and at worst spreading blatantly incorrect information.
Okay...so...can you please just omit the experience-o argument here? I mean, it seems like a very unsportsmanlike argument to prove a point.
"I am correct and you are wrong because...um...because...because I am better than you!"
And no, I don't see if I am contradicting myself. What I see is both you and me are fighting for the same side while not realising so (although you have worded your opinions in a much more clearer way, no doubt.

).