My generation? If we got a goitre we just had a dinosaur eat it. In truth they're really rare here and have been since the early 20th century. I also eat around twice as much fish as the average American so iodine isn't a problem. Also, sea salt DOES contain iodine, just lower amounts than are added to table salt.Because the sea is kind of dirty these days and frequently has more shit in it than the table salt which is typically mined. And no iodine - most people of your generation have never seen a goiter, the most common side effect of insufficient iodine. Gross AF. Iodine deficiencies cause chronic fatigue and developmental delays in children because your thyroid gland gets fucked. Been dragging ass? - get some iodine, stat.
The anti-caking additive is just calcium and silicon. SIlicon is the eighth most common element in the universe - you'd die and your body would literally disintegrate without it.