They usually parry it, evade it, deny the reality and many times respond with annoyance or provocation. We suffer pain when we are emotionally deprived, beginning in infancy. And we suffer anxiety and deep sadness when we learn of our personal death, often at a far earlier age than most people realize. We develop psychological defenses to protect ourselves against this pain. You seem to be saying that we all develop these defenses, and that they damage us.
All children suffer varying degrees of emotional deprivation.
When the parental climate is characterized by emotional rejection, insensitivity or outright hostility, the child forms defenses to cope with psychological pain. The parental environment can vary considerably in meeting the emotional needs of the child. The more positive the original attachment, the more likely the child is to find satisfaction in adult relationships. The converse is also true. The extent to which people come to rely on psychological defenses is proportional to the degree of pain they experienced in their formative years.