I think determining root cause, if possible, is a good idea. No harm in that. TRT should be a last resort -- he's correct. But, if you're definitively not producing enough testosterone to keep your symptoms of low T from occurring and nothing else works to elevate your testosterone levels then it would be silly to expect you not to want to get on a TRT program. You're 30 y/o, but some people who are even young have been found to have permanently low natural testosterone levels. What are they to do? Suck it up and suffer because they don't fit the rigid parameters of the guidelines? Or would it make more sense to just treat the fecking patient? I think you know where I stand. Get as many answers as possible and then assess your options.