God yeah caving is such a bad idea unless it's already confirmed safe to be in. In addition to the well-publicized risk of getting stuck in a pocket with the blood pooling to your head, you've got collapses and cave-ins, wild animals, noxious gasses, lack of air circulation, there are so many reasons not to go into a cave you don't already know is safe.
Spelunkers are crazy, out of every stupid thing you could do that has a high chance of killing you of you if you make a tiny mistake you choose spelunking?
Exploring beginner friendly caves is really cool. But tight passages like this and the nutty putty cave one are absolutely terrifying, and I want nothing to do with it.
My first and only cave experience was with a friend who had done the tunnel before so he knew where it went and was safe. It was slightly wider than my shoulders and started with climbing a rope up into the tunnel from a river and ended with a T intersection.