there are two distinct "schools of thought".
On the topic of Lundin, he's kind of a mixed bag.
Some of the courses offered by his organization are pretty hardcore hunter/gatherer stuff (at least according to the course description). But Lundin communicates over and over again the importance of carrying a modern PSK and at any moment using whatever works best.
Hear, hear. Contemplation of making a fire by rubbing two sticks together usually spurs me to buy more firesteels, stormproof matches and Bic lighters. I have them all over the place - car, coats, packs, purses, bike bags.
Ideally, I'd have the knowledge to survive with no gear and the good sense and good fortune to have plenty of gear.