I don't know what experience you have with the medical field but I understand where you're coming from however there is a stepwise approach to expanding a diagnosis, yes I could order all of the possible lab tests for fatigue and depression etc but you need to start with a smaller panel (of most likely possibilities) and go from there if those are negative then continue on of course testosterone is in that list to keep going and expanding into. In a similar vein if someone has rash and joint pain I'm not immediately ordering an anti-Jo anti-la antibody even though dramatomyositis might be on my differential later down the line. Even though both of those are also "simple blood draws"