And the moon has massive effects on the tides, yet somehow seems to avoid getting blamed for causing cancer. Likewise, music makes your ear drums vibrate, yet where is the commission looking into rock 'n' roll 'n' cancer?
The reason it would be "retarded" to think those cause cancer is because there is no mechanism by which they could cause cancer. Likewise, there is no mechanism by which non-ionizing radiation can cause cancer. It is orders of magnitude to weak to have any effect.
It's not a blanket statement, it is a reasonable position to hold in the absence of any evidence to the contrary.