Ha that's funny. I am a "survivalist who runs around cavorting in the depths of the wilderness". But your two points are spot-on. We have a few deaths per year, maybe a little less, up in the mountains. But the main reason is due to panic. People get lost, panic and work their way into exhaustion, then lay down to rest and die from hypothermia. Many panic so badly that they throw their gear, and guns away, shuck their packs, and run like a rabbit until they drop, then freeze. Rescue often finds the gear first, then the body(s). It's very sad, all you have to do is build a fire and stay awake all night. And "remain calm". Beats dying. And of course the "small things" and tricks do make a big difference. Anyway you can increase your comfort is a plus. Being able to make a cup of coffee, tea, or coco three in the morning while waiting for daylight is a biggie for me.
I would agree that desert and swamp are much more difficult to navigate in. I probably have it "easy" in that there's usually a good chance of just going downhill, and plenty of water sources. On the other hand, there can be lots of thick brush and blow-downs that are almost impossible to penetrate which is really...bad! I've only spent one night in the woods unintentionally, in the winter. Made a fire, waited for daylight. I wasn't "real lost", had a good general idea of where I was, but knew I could wind up going down some nasty steep downhill and cliffs if I tried to walk out in the dark. Or, become "really" or more lost. I actually got some sleep, by building a "long" fire, and laying next to it. Only seemed like minutes when I'd wake up, and the fire would be totally down to coals and the cold would wake me up. !
I rely on map and compass, but carried a GPS for years, but only used it to double check my map and compass findings. Using a GPS that way is a really good teacher of the map and compass. If I go into very/really unknown territory these days I'll take the GPS, but usually, to save weight, just rely on the map/compass. And a way to make fire.