Note that the very interesting graph near the end of the article actually displays element abundance in the solar system, not in the universe. (Found that out when looking it up in Wikipedia.) The article misrepresents this!
The cosmological principle works when considering a large enough scale. A solar system of a particular type of star, even though that star is pretty average and unremarkable, is not really large enough.
Link: http://commons.wikimedia.org/wiki/File:Nucleosynthesis_perio...