Earlier quoted context omitted.
As opposed to the gender-neutral 'they', which is the Best Thing (that few people seem to realise).
For many years I insisted on using the grammatically correct he/she. While I sympathize with they, I cannot bring myself to use it.
Question: "Did you hear about that person on the radio before?"
Potential answer A: "What about them?" Potential answer B: "What about him or her?"
They, them, and their as singular pronouns aren't grammatically incorrect.
What I find confusing about the issue that prompted this (using 'him' or 'her' specifically, and celebrating the choice of the latter over the former) is that it will inevitably come full circle, and be no less weird for it. Technology is too female-dominated, best invert the pronouns again to make it seem fairer.