I was showing my daughter's boyfriend (they are both adults) some things in the reloading room tonight, and talking him through some things gun-related. Having been around guns literally all my life, sometimes I'm surprised at the lack of knowledge non-gun people have. He was blown away by my Lee APP and the ability to decap brass as quickly as it's capable. Then I showed him the ins and outs of military brass, how to swage a primer pocket and use a primer pocket go/no-go gauge. When discussing things like rifling - lands, grooves, twist rate...he had no idea. I was telling him about a cool video I saw from Erik Cortina that talked about why you shouldn't chase the lands/try to measure the lands, and why it's more important to know jam, touch, jump, and how to use those to find your accuracy nodes. I think it became a bit overwhelming for him.
Are we just weird that we understand things like trajectory, ballistic coefficient, bullet drop compensation, bullet types, sizing, powder types, burn rates, crimp, crimp grooves, cannelures, grains, etc?
No. Most people who are deeply in to a hobby or profession understand a huge amount about that hobby or profession. If some audiophile started talking at length I am sure they'd pretty quickly lose me even if all of the words were English.