I totally agree. It's a bit unfortunate to hear that being open and honest about seeking treatment for mild symptoms that do not relate to my ability to do any job is likely to be more of a hindrance than anything else. I've always been a bad sleeper and that's never prevented me from being productive at any of the high stress jobs I've had over the last 7~ years, or in maintaining a strong exercise regimen. This is purely something that I'm considering as a recommendation from my doctor to address what she perceives to be something I shouldn't have to deal with. As for the mood, that's really once again something I never really thought to address, but I can appreciate the validity of some of the observations she's made. I'd argue it's more a function of having to work a fairly dull desk job for as long as I have to make rent while I sort out my future/school and all that stuff.
However, the brain is a big organ with a lot of mechanisms and can become "sick" or out of whack just like anything else. You would not attach a stigma to someone who is hypothyroid and needs to take a medicine for that.