"People never like to hear they are controlled by chemicals since it makes trash of the notion of free will" I do not think so, because the system of chemicals

"People never like to hear they are controlled by chemicals since it makes trash of the notion of free will" I do not think so, because the system of chemicals and electromagnetic fields that makes us us, are likely indefinitely complex. "I" am the sum of it. And I can freely decide in that moment now, no matter that the "decision" can also be desribed as countless chemical and physical reactions (and that you can influence that).