Yes, I'm sure of it. If anything, it is the opposite of what you would learn in Disney. There are people in the concentration camps who did not steal or who even gave away the food they had to help others, people who go on hunger strike until they die for principles, there are people who go to certain death in war on principle, lots of examples of people who would die to protect their family rather than abandon them, and there are examples of people helping others get the safety/on the helicopter harness until they themselves die (and that's where saving themselves wouldn't even be viewed negatively or break a personal belief, it's just pure unselfish helping others at the cost of your own life). Those principles, or the resilience of them, may be uncommon or even rare, but it is definitely possible to have a stronger desire to have integrity and comply with a belief system than to live.