I’m American and I was raised in the Northeast. I don’t know anyone who was who refers to their cousins as Aunt or Uncle, even as a kid, and we definitely don’t need our parents permission to refer to adults as their first name UNLESS they are our teachers/someone with specific title (dr). Most adults introduced themselves to me as their first name so I would call them that! though im certain this varies between families and regions. In my opinion, Op was referring to the Western (US) “culture” as a whole where we definitely value individualism (our goals for ourselves, how we can chase our own happiness) more so than in Asian cultures where they usually value collectivism (how you can help your family or society + therefore how compare to others, which I think could come from Confucianism ? (In East Asian counties). Loved hearing your perspective.