>>How can something that organism makes for itself be harmful? There may be some correlation, cholesterol may be organism's way of responding to a condition, as leukocytes are, but then fighting cholesterol would be exactly the wrong thing to do. Or the right thing, if you're a drug dealer. Ooops, scratch that, politically rectifying: if you're a pharmaceutical company.
LOL. I have no confidence in the body's magical ability to know what is best. Consider that the body is the source of its own cancer cells (apart from the ones that we now are sure are provoked by virus, such as cervical) as well as the blood clots that cause strokes and the autoantibodies that cause rheumatoid arthritis, Lupus, short and long sight, and so it goes on... to be honest, it's amazing that the thing operates as well and for as long as it does.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1