Because Hulda Clark is one of the most notorious quacks of all time. Apart from the herbs she suggests (which were known to kill worms a long time she was born, and tested to have less efficacy and more side effects than the standard pharmaceuticals), absolutely everything else she has said is absolute BS.
As if worms cause ALL cancers!!! She calls all roundworms "ascaris" and represents flukes only by fasciola buskii. She then completely and utterly misrepresents the scientifically accepted life-cycles of both these organisms, as Ascaris doesn't really leave the gastrointestinal tract, and all flukes require a snail or some other type of vector to complete their life-cycles.
Her "liver flushes" are believed to do little more than make you crap-out a coagulated version of all the oils you have ingested. And I'm not saying anything about her "zappers"!