There are a few potential reasons for this. One possibility is that the person may have come across a difficult or sensitive topic that they are unsure how to respond to. They may be hesitant to offer any advice or opinion for fear of saying the wrong thing or causing further harm. Additionally, they may not have enough knowledge or expertise in the subject to provide a helpful response. Another reason could be that the person is simply not interested in the topic or does not feel motivated to engage with it. They may not see the value in discussing or exploring certain subjects and therefore choose not to respond. It's also possible that the person is experiencing a lack of confidence or self-doubt, which prevents them from feeling comfortable contributing to the conversation. They may doubt their own abilities or knowledge and feel uncertain about their ability to provide a meaningful response. Finally, some individuals may have a tendency to avoid conflict or uncomfortable situations. If a topic brings up strong emotions or potential disagreements, they may choose to disengage from the conversation altogether in order to avoid any potential conflict or negative interactions.

The word "hostile" is an adjective that describes someone or something that is unfriendly, aggressive, or antagonistic. It can refer to a person's demeanor or behavior, or to a situation or environment that is unwelcoming or confrontational. A hostile person may display hostility through their tone of voice, body language, or actions, often intending to harm or cause trouble for others. Similarly, a hostile environment may refer to a place or situation where there is conflict, tension, or a lack of cooperation.

The term "hiding in plain sight" refers to something or someone that is easily visible or noticeable, but is not recognized or acknowledged due to its ordinary or unremarkable appearance. It suggests that the thing or person is camouflaged or concealed in a way that it goes unnoticed by blending in with its surroundings or by appearing to be something else. This phrase is often used metaphorically to describe situations where something or someone is present or available, but goes unrecognized or undervalued because it does not stand out or draw attention. It can also be used to describe situations where someone is deliberately concealing their true intentions or identity by presenting themselves in an unassuming or inconspicuous way. For example, a spy who infiltrates an enemy organization might hide in plain sight by assuming a regular job or disguising themselves as an ordinary person. Similarly, a valuable item may be hidden in a plain box or disguised as something less valuable to avoid drawing attention.