Can you shed some light on what your experience is that you are getting this number from?
You don’t list a unit of measurement but this sounds suspiciously like the 1000 ng/dL number that the TRT crowd often (incorrectly) bandies about. It is based on the hypothetical upper limit of an 18 year old male athlete who still has his elevated puberty levels and hasn’t settled into his functional adult levels typically.
The .gov health website numbers list a more realistic healthy adult male range of 350-750 ng/dL.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4255853/
As a reference point, when I was in my early to mid 30’s and at my leanest I was 5’10” and 170 lbs and hovered between 3.5-5% bf as tested by skin fold and BIA. My testosterone levels were in the mid to low 500’s (ng/dL), considered “normal” and capable of supporting 4 hours a day of hard competitive grappling training.
Although I don’t have a huge sample size, I do work in the nutrition and S&C industry and the only people I have seen with test levels in the 800-900 ng/dl range were the over 30 TRT crowd that attained those levels through injections or creams. Moreover, their docs considered 1000 ng/dL too high and looked to maintain the 800-900ng/dL as an upper limit.
I've never seen a natty guy over 750 ng/dl personally. Have you?