I doubt that you can find a scientist doing research on radiations effect on the body that dogmatically has said that "non-ionising radiation _can not_ cause cancer". I will personally call this scientist up and lecture him/her on the merits of doing science scientifically.

So if you "doubt" the dogma by saying "non-ionising radiation _can_ cause cancer" every scientist, and me, can go "Fk yeah, thats a working hypothesis, go prove that and bring society forward".

But if you would say that "non-ionising radiation _causes_ cancer" you are "stupid" in the way that you don't base that sentence on the current state of science and you are just making things up because you have been "working with biologists for many years" and you are a proud user of Common Sense™.