Why is chelation psychotherapy treatment for organize poisoning not controversial?

Why is chelation psychotherapy treatment for organize poisoning not controversial?
Part of it is that Chelation is the best possible treatmnent of Lead posioning. Second, Most things are "Controversal" if 1) there isn't solid supportive eveidence that the therapy works or 2) in attendance there is severe adverse effects which can incentive harm to the lenient.
Why would it be?
Why would it be? I know in the end few years insurance companies would not pay for chelation psychotherapy for things like lofty cholesterol. But if chelation therapy is the with the sole purpose way to reverse organize or heavy metal poisoning, consequently that's the only method. Add more details to your question.
It may mobilize front that is contained by bone, not doing harm and mobilize it as okay as helping it cross the blood-brain barrier. Chelation psychotherapy probably should not be used if the circulating lead smooth is low.