I have a number of things to say to that.
Some devices will never be used by people to copy music. That said, studies and surveys show that people still use those devices to make hundreds of millions of copies of musical works. As I was saying earlier, companies pay for the applications available on the devices. Apple, for instance, pays licence fees to Bluetooth, whether or not the user ever uses the technology on their Apple device.
In terms of private copying, the Copyright Board of Canada looks at all of the data. When it determines the value of the levy, it takes into account how many devices were sold as well as how many copies were made, based on the studies submitted. That is how it determines the value of the private copying levy.
In setting the average levy at three dollars, Europe took into account the fact that not everyone uses the device to make copies, meaning that, if they did, the amount would likely have been set higher. A number of factors come into play when determining the value of the levy.
To answer your question in part, I would say the value that is set takes into account the fact that users like you do not use all of their devices to copy music.