I was on a trip once where it was my day in the kitchen and we had a trip member that most people didn't know well. I'm doing my thing and look over to see this guy trying his damnedest to make some sort of a bonfire in 20 mile an hour winds. There is already sparks flying into the trees. Everyone else is sort of hemming and hawing that someone needs to go and talk to him but no one wants to be confrontational.
I said screw it and grabbed a bucket of water and marched over and unceremoniously dosed the pending forest fire. Everyone has a holy poop stain moment until they realize that it wasn't going to cause a group meltdown. The look on the guys face was priceless. Before he has a chance to register what just happened I make a joke about white man fires and federal prisons to cut the tension.
It ended up being one of the funnier moments of the trip but I can easily see how it could have gone far differently and ended up as a "Steve" trip. Guy just wasn't used to being in places where you can easily cause a fire. He was trying to be helpful to the group by getting the fire pan going and assumed because there was no ban in place that anything goes.
Edit to add...I just realized that you said right of the bat that Steve is a doctor. No wonder he didn't react well to not being the smartest guy in the group that everyone automatically deferred to
It had to be hard on him.