Pandalisk said:
"Music is an art form whose medium is sound and silence"
You could have just described anything from the chatter of a waiting room to the cars passing on a motorway to the sound of typing in an office ...
On topic. When I was at school we were taught about musical instruments, among which was not the decks or the computer! It takes absolutely fuck all skill to make dubstep, all it requires is money for the equipment and a taste similar to everybody else's (or a majority at least).
You could spend 1,000 hours perfecting the "song" then all you have to do at a live performance is press play.
I define anything as art (or in this case music) as something which takes skill to do, such as playing a guitar in time with everybody else in the band. Take art for example, I wouldn't consider a white canvass with different coloured horizontal stripes art 'cos any fucker can do that! I would call the Mona Lisa art 'cos that is a skillful thing.
The only exception I have to dubstep not being music is beardyman, who does something called live looping. He makes a sound, records it, loops it makes another sound, records it, loops it, layers it over the first sound, then repeats till he has a full song going.
That takes skill to do! This isn't live looping but it is harder to do.