Survival is not selfish because it is considered a natural instinct, imperative to one's life, and it helps to move on and save people's lives. For some, survival is considered a “natural instinct”, and it comes naturally to one, so when faced with a dangerous situation, we often tend to refer to this. If I want that time, I have to take it. And if it means skipping a playgroup or abstaining from afternoon chores, so be it.
Putting your family first at all times is not sustainable. You can only do so much for everyone, and be so much for everyone, before there is so little left of you that you fall into total exhaustion. According to a 2004 study, Holocaust survivors have developed a habit of storing a large amount of food, having difficulty throwing away food, and even feeling anxious when food is not immediately available.