Back when “Y2K” was looming, I described the extensive worst-case SHTF scenarios to my father. He listened attentively, nodded, and said “if that happens, I’ll throw another log on the fire and go back to my book” - not because he didn’t care, but because he has integrated “prepping” so deeply into his lifestyle that, despite looking like a normal life, TEOTWAKI would hardly affect him.
Your father is typical of the people I know that I consider real preppers. Paranoid are scared of something. Real preppers are calm and not scared of much of anything. Why? They are prepared!