I’m in agreement with you and I am grateful to have this med available to me; I am counting on it to be of great value for my 98/99% ER+. I feel safer taking it. What you say stands to reason and makes perfect sense. That said, the medical and research establishment is looking into lowest possible dose/effectiveness ratio. They mention the reason is because side effects account for significant non-compliance. This does make one wonder what is under consideration because, as you say, the side effects are BECAUSE of estrogen reduction… which is what is needed for treatment.