I've now successfully cured the supposedly incurable disease, and live happy and healthy with a fully functioning thyroid. More important and subtle to note, probably, is the fact that the groundwork has been laid within my body for it to express a different truth.
When we possess an expanded understanding of ahimsa beyond only vegetarianism and accept every person as they are, we then have the best capacity to support transformation and positive change of any kind.
We do need external teachers for a while to guide, teach and hone our understanding and skills. But, at some point, all a teacher can do is lead us inward. Like a big cosmic U-turn, the guru is ultimately only trying to lead us home.
At some point, every student must leave their teacher. It's a built-in principle of yoga. Parents raise children to be able to survive on their own at some point; its the same concept between teachers and students of yoga.