Board Thread:General Discussion/@comment-28547930-20160525050019/@comment-25814498-20160525220210

It's entirely possible that they have researched Nen but simply refuse to reveal the data to the public. In my opinion, the main reason seems to be the fact that non Nen Users can't see Nen, and therefore things such as transmutation, enhancement, or simply basic techniques such as Ren can only be perceived to be super powers; similar to what Wing said in his introduction to Nen.