I think you are both right and wrong. Fear will without a doubt not make ones symtoms better (more likely worse). But positive thinking will not make a lactose-intolerant (for example) absorbe lactose any better. I believe that fructose malabsorbtion is not spreading and is not "contagiuos", but fear can definitely "spread" and it is important to make it clear that any beginners should try EFI diet and SF supplements for at least 1-2 months before making any ungrounded judgement about it not working for them. However, I also believe that after a trial period of several weeks (maybe months) one should definitely look in to other posibilities if the symtoms persevere. Maybe fructose or sorbitol could be the problem? And I dont think it would be dangerous at that point to try a modified EFI diet for a couple of weeks, just to find out. If the symtoms dont improve despite all the measurements, then maybe one should go back to EFI and pay their doctor another visit?