“Playing God”

I am exploring the notion that “It is not right for Man to play God” is actually code for “Don’t use big words. Big words are scary. Stop it or I shall encourage other people to kill you by burning you alive or perhaps beheading you, unless that is not currently socially acceptable, in which case I shall shun you publicly.”

Humanity plays “God” practically every day of the week (and twice on Sundays).

Why draw the line at big words?