What is a system? There are various kinds:
First, the tone systems we call scales. These are entirely arbitrary constructions made to aid memory. Period. If they had real validity the world wouldn't contain so many varieties of them.
Second are the visual systems we call notation. Again, there are different kinds of notation, none of which corresponds to music.
Third are the motoric systems we call technique. This finger there produces that.
None of this makes music.
I am reminded of the true story of the little Italian boy who wanted to learn clarinet from the local master. Rather than start off with lessons the boy had to spend a year hanging around the master, and singing, singing, singing.