I've also played wooden spoons, a TB-303, TR-808, TR-909, Classical Violin, Appalachian fiddle, Classical Cello, Classical Piano, Piano Moderne, Three kinds of Organ, Several Synths, Tracker, Marimba, Xylophone, 북, 장고, Kazoo, Slide Whistle, Pot and Pan, 5-gallon drum, Hang, Recorder (modern and classical), flute, penny whistle, Appalachian dulcimer, Hammered Dulcimer, 꽹과리, 자바라, and on and on and on. I'm not even uniquely qualified to comment on this because music is a universe, not a spectrum.
If you can't create beautiful, soulful, music on a Kawai MP10, or even a bag or sand, then I question your authority on music. You rely on expensive instruments as crutches to fill in your musicality, when you need to develop your own. Start with simple instruments and when you can put soul into a pair of wooden spoons then you can move on to more expressive instruments.
Somebody who can't perform with soul on a Kawai MP10, then any discussion is more than meaningless because you've limited soulful musicality to such a tiny fraction of music and instruments in the world that you definition is effectively useless.