I really don't like this attitude. It's just smugness about medical knowledge, because it's often paired with a hate for people that come in for things that are easily googlable... Directing people HOW and WHEN to do research would be so much more productive for a working doctor-patient relationship.
It's a pedantic point but most medical doctors don't have PhDs, they have what's known in some places as an "honorary" doctorate from their medical degree, hence the title "MD", for Medical Doctorate, rather than PhD.
Legit though, if you have balls, you should be able to have a useful discussion about their health with your doctor. Don't need to memorize every single part that's involved, but the general anatomy, basic functions, and for fucks sake how to check your balls for changes.
This is true of every part of your body tbh, but the balls are pretty damn simple to read up on. You can get the basics in an hour. Seriously.