Happens a lot on articles about non-western civilizations technological advancements. The writers -of this articles- assume that western technology is the best/most advanced (most probably without malice) and the others' are just cute or magical.
Right, and if some secondary source called out the fact that they are still in use and these guys are idiots then at least the original article would have made the sin of omission, and not the sin of outright contradicting yourself.