I've been in the 'smoky cabin' simulator and put fires out - yawn!!
I've not done it in a simulator, but I have done it on the line with a burning airplane, and in a burning building, and in a burning forest. I can imagine it's not quite like a "simulator." Simulators don't explode, you see. I'm sure you've contemplated that on your long overwater legs, too.
You've probably never seen the air around you begin to burn (flashover), had the air in your SCBA tank so hot it was painful to breathe, your mask crazed over and bubbled from the heat, or the rubber and the nomex around your face and head melted. I have. And it's not something that incites a yawn. Believe me.
Have you gone through an ATR hatch?
Nope. In fact, I can't recall ever having even ridden in one as a passenger. It's not really relevant, though.