That said, my husband and I recently took saliva cortisol tests, and our cortisol patterns are WAY off - low in the morning, high at night, which is the opposite of what they should be, and is the classic pattern in adrenal fatigue (you can call it whatever you want if you don't like the term 'adrenal fatigue' but having a deranged cortisol pattern is a concrete, measurable problem that exists).
Neither of us are hypoglycemic. We both have perfect fasting glucose numbers and can either eat sugary foods or fast for a day without a problem. So even though those two health conditions tend to have a comorbidity, there are probably lots of people like us who have one issue but not the other.
And while you could argue that my adrenal issues are possibly thyroid related, my husband has no signs of any thyroid issues; in fact, he runs hot (has a normal body temp, always kicking off the covers because he's hot even if I'm cold) and has a wicked high metabolism (he's a hardgainer).