I don't think you are asking whether an intelligent being could create parasites. You are asking about a benevolent being creating parasites
Exactly. Why would a benevolent being create such creatures?That is the question.
Could we survive in a world where there were no controls of populations? Could we survive without animal consumers of life? If not, then it is very 'intelligent' to allow nature to be nature.
Well if the best method of population control a benevolent and powerful being can come-up with involves the victim being eaten alive in agonising and debilitating pain what does that say about either the limitations of that power or the paucity of it's benevolence??
Surely unconscious, indifferent and unplanned forces of nature are more consistent with the facts of parasites than any sort of benevolent being powerful enough to create all life???