There are so many experts and gurus out there ... especially in the field of health ... that what one says is bound to cross with another's.
I personally try different things that have any reasonable chance of working and watch it's effects on me. I make my decision that way.
coffee enemas for me (as a slow oxidizer, and what they call a pathological detoxifier with significant liver issues) have been a G-dsend. It's the only thing that I can count to work sometimes. But like I said, what works for me may not for you.
Does Moritz say this about psyllium in an enema, or taken orally?