> but you do not know it

Neither do people on their death beds.

> because you don’t experience it’s ‘ground rush’.

Death isn’t a spectrum. By that logic, someone who almost died because of a car accident has better insights than someone in a hospice withering over months or years. A person who began pondering their own mortality a week ago because they got terminally ill doesn’t have more valid insights on life and death than a moderately healthy person who has been thinking about the subject every day for two decades.