Interesting theory, I think that it makes sense in a way. I think Hulda Clark e says something like that in her book 'Cure for all Deseases'.
In my 32 flushes I have not seen any sign of parasites. I cut 1 or 2 of the stones in half every time to see if anything is there. I even cut my two 5cm x 3cm dandies. They were all shiny dark jade inside the same as outside. I see nothing at all. Of course that does not mean that there are none.
I have done several parasite cleanses without any visible success. Again, maybe they just don't show up for inspection.
I have passed 2 quarts of stones and stuff during my flushes and I can feel that there is lots more to come. I do keep on taking anti parasite support from time to time.
Giz.