Understanding hormones is a cornerstone of urology, not a departure from it.
Why a urologist
Urology deals with the adrenal gland, the parathyroid, the hypothalamus, the pituitary and the gonads. Those are all endocrine organs. Understanding hormones and the pathways connecting them is part of the training rather than an addition to it.
The same machinery in both sexes
Men and women share the same major hormonal systems. What differs is the amounts, the ratios, the timing, and how tissues respond.
Testosterone is not a male hormone that women happen to have. A healthy woman in her twenties carries four to ten times as much testosterone as estradiol once you put them in comparable units. It does not look that way on a lab report because the two are measured in different units entirely.
Estrogen is not a female hormone that men happen to have either. Men convert testosterone to estradiol and need it for bone density, libido, cardiovascular and cognitive health.
Why one number rarely settles it
Most of your sex hormones are bound to a carrier protein and unavailable to your tissues. Conversion pathways turn one hormone into another, and feedback loops respond to whatever you do. A single value pulled out of that context tells you less than people assume.
Which is why chasing one lab number is the most common mistake in this field.
What it affects
Energy, sleep, mood and mental clarity. Muscle and strength, bone density, body composition and metabolism. Sexual function, cardiovascular health, and how well you hold up as you age. There is hardly a system in the body that runs well when the hormones behind it do not.