Many languages. . .have no gendered pronouns. English needs a gender-neutral singular pronoun, and as Winston Churchill said about democracy as a form of government, “they” is the worst option, except for all the others.
-Anne Fadiman, Harper’s, August 2020
Language changes, perhaps in response to social pressure or a communicative need – or for no functional reason at all, as with hone in on replacing home in on, mainly, I guess, because the two sound alike, hone connotes focus and sharpness, and people forget what the home in home in on means.