When playing slow music - you show off yourself as a musician, when playing fast music - you show off yourself as a musician AND an athlete.
This thought is anatomically and physiologically flawed ... that's the point
You really need to read something about the physiology and anatomy of piano playing
There are even books with all the results of intensive tests to understand what really happens when one pianists with proper technique play effortlessly
The difference between playing fast pieces and athleticism is huge
A better analogy is piano playing and golf
That's because effective technique in golf depends on letting go of all the unecessary tension in grasping the club and in perfect alignment in the movements of hitting the ball
I would like to know why you believe that you need muscular tension and contraction in order to play fast pieces. Let's forget for a moment how your arms feel when you play and just explains to me a rational, logical, anatomical and physiological principle as to why speed requires muscle tension and contraction
Speed is not a physical barrier but a mental barrier
There's no finger virtuosity vs. brain virtuosity because it's all in the brain
How do you condition your fingers to play fast?
You condition the tendons (which can't be conditioned)
You grow muscles in your fingers?
You grow extra cartilage?
Speed is a motorcoordinatory phenomena.
It all comes from the brain, there's nothing in the fingers or hands that develop speed
Speed is just thinking ahead of the movements you've mapped so there's no hesitation
That's also way piano schools that focus on breaking mental barriers have 4 grade students that play normally paced pieces but could play as fast as they want (if it was required by the music) because they broken the mental barrier. Once the mental barrier is broken there isn't anything anatomical and physiological in making your "fingers fast"
If you look at the anatomy of sport and athleticism you'll see in the case of athleticism is not so.
What you haven't understood yet is that very few people have cared for your provocations about "speed" because they know that speed is a piece of cake ... it's a nonsense to focus on speed because it's nothing more than breaking a barrier and once you've broken it there's no boundary really. Speed is not physical and you'll never find someone knowledgeable on the human body that will tell you otherwise. The people you have annoyed with your speed argument are perfectly able I'm sure to exceed your speed anytime they want (because one who understands speed is not physical and not a matter of athleticism is also the one who master it) but they ignored the competition anyway because they're real "artists" and don't need to demonstrate anything ... just playing good music whatever speed it is
People are ignoring your arguments about speed because those who have really mastered speed by understanding it is just a mind barrier and muscles have nothing to do with it can finally focus on musicality and expression. What I mean is that when it's not an issue for your anymore you can focus on better and harder aspects as they know speed is just tangential to the piece ... just a mean of expression ... just like softness and slowness are