That is an extremely important observation, IMO. The idea that iodine protects the thyroid in case of RAI exposure is predicated on the outdated notion that the thyroid is the ONLY part of the body that utilizes iodine. From iodine4health.com:
"Iodine is detected in every organ and tissue in the body. It is found in high levels in the thyroid, breast, stomach, saliva, ovaries, liver, lung, heart, and adrenals."