Well it's difficult to know with your case, in theory there's thousand's of reasons why one can have developed hypogonadism but unfortunately life is as it is, we cannot factor in everything.
I have been completely healthy all my life, well clinically atleast! I have had 2-3 episodes of high stress situations, i have been prone to mild depression for a long time. What's the cause and what's the symptom is unknown. Best practice seems to be rule out something bigger than hypogonadism and treat what you have.
Since the symptoms of low T, hypothyroid, adrenal insufficiency are all so similar,you want to see what;s the problem. I also find the thyroid obsession to be a little unhealthy for people with low T with the anxiety and vulnerability it brings. My thyroid labs are good. Temps vary, but i don't think it has as much to do with thyroid function as we think it does here. For example, when i am active and work, go to the gym and in general on the move, i see my temps are good, when i'm in bed all day which is more common in the past month or so i have a little lower reading, i have stopped recording as i don't want to turn into a hypochondrial mess and obsessing about how my temps were on a particular date.
In sum, i have a pretty good understanding about T and other androgens and estrogens now after so much reading so i am prepared to tackle the issues when they arise. Same to a lesser extent with Thyroid, but adrenals i'm not so sure about. There's confusing info out there, that's what i'm trying to figure out a little.