Your arguments, simplified, are 1) "we don't need to include other philosophy, because we only teach western philosophy", 2) "it seems kind of like all written

Your arguments, simplified, are 1) "we don't need to include other philosophy, because we only teach western philosophy", 2) "it seems kind of like all written philosophy is western, so your example is bunk", 3) "somebody can eventually add some other culture's philosophy to this page so we don't need to change it at all right now". They should either change the title of the page, or include all other philosophy. But the current state is at the very least incredibly lazy and misleading, and at worst, insulting.