I think that it’s important to note that gendered pronouns aren’t even that common to begin with, cross-linguistically speaking. WALS for example shows 254 languages without gendered independent pronouns, versus 124 with some gender distinction.
Based on that it’s less that the Australian languages mentioned there* are the weird ones, and more like the others are.
In special you’ll find plenty languages with gendered pronouns in the Indo-European and Afro-Asiatic families. Mostly because they either inherited a grammatical gender system (like Spanish did), or those pronouns are leftovers of one (like in English).
*I think that they’re mostly from the Pama-Nyungan family, but I’m not sure.
It doesn’t seem to answer the “here’s why” part
because there’s no reason for this sort of thing. some languages have noun classes. in some of those, the noun classes happen to somewhat line up with male/female.
this is some woo shit, attributing the lack of grammatical gender to some unique perspective. bullshit.
hungarian has no grammatical gender either, and hungary is exactly as sexist as every other european culture.