The author suggests that self-preservation is supposedly an people don't always react as expected in dangerous situations.

It seems like you're discussing a concept related to self-preservation and human behavior in dangerous situations. The idea that people don't always react as expected can be tied to various psychological and situational factors. For instance, in high-stress scenarios, individuals may experience a range of responses, such as fight, flight, freeze, or even tend-and-befriend, which can defy the instinctual notion of self-preservation. Factors like fear, panic, social dynamics, and prior experiences can influence how someone reacts when faced with danger. Additionally, some people may prioritize the safety of others over their own, demonstrating altruistic behavior even in life-threatening situations. This complexity highlights that human behavior is not always predictable and can vary widely based on context and individual differences. If you have a specific text or context in mind, feel free to share more details, and I can provide a more tailored response!