What is a syndrome? It is a observation of related symptoms/conditions.
It seems that we have a syndrome of hypothyroidism and subclincal hypothyroidism. Some of which seems to be related to iodine deficiency [ID]. So are TRT guys really more prone to iodine deficiency? Maybe we are simply asking the right questions here. If the general population is ID, then we can expect to see that in the TRT population.
The combined effects of low T and some degree of functional hypothyroidism is synergisticly bad, 2+2=5. The major hormone systems affect each other, a hypothalamus/pituitary function is not going to work well when one is hypothyroid. Mental function has compound problems from adrenal, pituitary, thyroid, testicular insufficiencies. Libido is a mental function.
I get frustrated by the collective reading disabilities or lack of concentration that requires that I repeatedly ask for the same info over and over. Lack of focus is a symptom.