I've been caving off and on my entire 50+ years and have been caving again after a hiatus. I also climb, so to me sport means clipping bolts, while trad is placing gear.
I've done caving for fun as well as surveying/mapping (which really is for fun too).
It seems weird to have some type of distinction, such as sport, when all caving is fun and except for a few, not a well paying enough job. It sounds like elitist snobbery.
Addition based on comments.
First of all Thank you for the explanations.
One of things I like most about cavers, besides they are the coolest group of people I've ever met, was that it isn't so bogged down in "elitist" jargon like one experiences in the climbing world. Cavers always take themselves seriously when it comes to safety and preservation, but beyond that everything else is just a lot more chill.
So, when I started seeing sport caving being used and heard the term a few times at the NSS convention last week I was curious about the effect on the community. It really peaked my interest when a couple of the old guys asked what sport caving was when it was brought up.
To me, caving is caving whether you are just exploring, surveying, mapping, preserving, studying etc. Because it's just fun, even at times when it's not.
Except for cave rescue. Cave rescue has always carried the highest level of seriousness and respect.