Hmm, I think the other way is more accurate. Embryo development is incredibly complex to the point where an entire field of biology is dedicated to studying it (developmental biology)

While everything is relative, I do think that introductory anatomy/physiology courses go way more in depth with the urinary system than they do with reproductive.

With the reproductive system, there are the various phases / cycles to memorize + the associated hormones.

With the urinary system, there are the hormones, how it affects blood pressure/volume, each section of the nephron, how the hormones affect the transfer of each molecule at each section of the nephron… and that’s just the stuff I remember off the top of my head

Nope making a human is harder