Lol. For more than several generations students were taught “they” is plural. Obsolete English is real.
I LOVE a knock-down, drag-out grammar fight.
In Garner's Modern American Usage (3d ed., 2009), he writes:
". . . they has increasingly moved toward singular senses. Disturbing though these developments may be to purists, they're irreversible. And nothing that a grammarian says will change them."
Also, after a long discussion of the lack of a common-sex singular personal pronoun in English (which is fantastic), Garner posits:
"Though the masculine singular personal pronoun may survive awhile longer as a generic term, it will probably be ultimately displaced by
they, which is coming to be used alternatively as singular or plural. This usage is becoming common --[examples given from a book, the NY Times, and the WSJ]
Speakers of AmE resist this development more than speakers of BrE, in which the indeterminate
they is already more or less standard. That it sets many literate Americans' teeth on edge is an unfortunate obstacle to what promises to be the ultimate solution to the problem."
Without comment on the intention of the author in the original article that started this post, it is clear that the use of the singular
they predates wokeness (which I suspect Garner holds in as high a regard as I do--not at all) and has been on the rise for quite awhile. Wokeness, though, has clearly amplified the adoption of its usage.