I agree, but I'd add that anybody with expertise in harmony/western harmony will and should say the same thing: harmony is not and should not be mistaken as part of the essential definition of 'what music is'. To me, somebody that's studied harmony a fair amount, it's actually a way to tell if a person knows what they're talking about
The basic definition is 'music is rhythm and melody' and that falls in line with the linear time/narrative/horizontal process...
Wait, I know what you're thinking!
Isn't rhythm and melody a rigid definition, especially for some electronic music?!! Well, no, because it allows the lack of rhythm and/or melody to be considered anti-rhythm and anti-melody, still maintaining the proper context. In fact, much of what might be considered anti-rhythm/melody is actually rhythm and melody. If we hold down a single key of an organ so it drones, that IS a rhythm and a melody, albeit a very simple (or super abstract and complicated
) example of both