I think it's progressive. I just asked a room of men aged 28-30 if they would order an independent online test for bladder cancer if there was blood in their urine.
Most said yes. There seems to be a mistrust of doctors in my generation. I imagine many of them would be less than confident that NZ doctors would be informed of the latest advances in medicine.
With a "slightly less than 1 in 10 chance" being significantly more than tiny IMO, I would argue that many would be concerned enough to bolster the information about their symptoms via this method. Why not? A copy of the information goes to the physician and or clinician anyway.