I do think that the "will to survive" has a great impact on how a person fares in a survival situation. But the will to survive really has nothing whatsoever to do with a warrior mindset.
Because the original question in this thread did not seem to involve the "Warrior Mindset," I didn't have anything to say about it. But now I see that the question of what a warrior mindset actually is has come under discussion.
Three classic works are the Art of War (Sun Tzu), The Book of Five Rings (Musashi), and The
Hagakure (Tsunetomo), all of which address mindset among other things.
As I grasp it, the mindset of the warrior involves winning the battle before it starts. That may not be possible. But if it is possible, the warrior will win because of his preparation. The texts mentioned above discuss this explicitly, each in their own way, detailing training, strategy and tactics. The warrior trains with his weapons and maintains them assiduously (whether that weapon is a gun, a sword, or any tool of his craft).
To the extent that the environment can be made favorable, the warrior chooses winning ground. For example, you know those pedestrian overpasses that cross freeways? Usually they are a long cage with a stairway on each end? A warrior would not willingly enter such a structure. The term "aji," which in this sense means "latent potential" means that a warrior jealously guards his options.
Training is how one develops faster and more accurate reflexes than the enemy's. Faster, stronger, better technique, tricks and feints, whatever tilts the playing to one's advantage.
In these kinds of ways, it should be apparent that the Warrior Mindset permeates all aspects of one's existence: You are either preparing and training, or you aren't.
As an example, if you train in H2H combat for one-on-many, as the defender a good strategy is to avoid letting the enemies encircle you.
Here is an actual case of how this works. In training, sometimes you get to play the attacker - you're one of the group of enemies. What you discover is that as you try to get to the defender, it's very difficult. He's spinning around, weaving, and doesn't give you a good opportunity to get at him and exploit your numeric advantage.
If you're a BG, you should have the same feeling when you try to attack a warrior. He's never in a vulnerable position. He turns out to be armed. He is faster and more accurate. In all ways, you will feel as if you have been outmatched and outmaneuvered even before you start. This applies to fighting, business, and all types of conflict and competition.