What I mean is that belief that it is an 'objectively real' phenomenon is not necessary. Just like you don't have to believe that you dream to dream (you do it whether you remember or not)- because just like you dream anyway, you project anyway.
What I am saying is that if you remove the 'need' to believe you have one less thing to worry about, instead of just picking a technique/routine and keeping at it until you get a result.