It used to be correct APA/MLA formatting to use “he/she” when the gender of a subject was unknown. That was changed back in the mid 00’s I think. The preferred format is now “they” over “he/she”.
That being said, people use singular they/them all the time in casual conversation. We just aren’t used to using it when we know or think we know the gender of the person. But let’s be honest, there have always been people that have been hurt by being misgendered. Hell, it was common for some racists to use they/them with black women in an attempt to dehumanize them. So this idea that the singular they is new is absolutely ridiculous.
It used to be correct APA/MLA formatting to use “he/she” when the gender of a subject was unknown. That was changed back in the mid 00’s I think. The preferred format is now “they” over “he/she”.
That being said, people use singular they/them all the time in casual conversation. We just aren’t used to using it when we know or think we know the gender of the person. But let’s be honest, there have always been people that have been hurt by being misgendered. Hell, it was common for some racists to use they/them with black women in an attempt to dehumanize them. So this idea that the singular they is new is absolutely ridiculous.