If it helps, the inaccuracy argument never really held water. 18th century grammarians (who wanted English to be more like Latin) argued that generic he was better because it agreed with its referent in number. But even if you accept that premise, all they did was trade an inconsistency in number for one in gender. That's certainly not a win and arguably a loss for accuracy.
People may not have noticed that at the time, but we do now for obvious reasons, which is why singular they has made a comeback, not that it ever went away. It's just idiomatic English reasserting itself. Soon we'll forget it was controversial.
> all they did was trade an inconsistency in number for one in gender. That's certainly not a win and arguably a loss for accuracy
It's not progress to revert to a previously-fixed inaccuracy solely because of changing tastes. We wouldn't admire it in programming unless it were clearly necessary, or at least a useful kluge on balance. Here, it's neither.
The better approach would be to coin another word, along the lines of Ms. vice Miss and Mrs., as I suggested above. Quoting Wikipedia: "For example, abbreviated pronouns have been proposed: 'e (for he or she) or 's (for his/hers); h' (for him/her in object case); "zhe" (also "ze"), "zher(s)" (also "zer" or "zir"), "shi"/"hir", and "zhim" (also "mer") for "he or she", "his or her(s)", and "him or her", respectively; 'self (for himself/herself); and hu, hus, hum, humself (for s/he, his/hers, him/her, himself/herself). [1]
People may not have noticed that at the time, but we do now for obvious reasons, which is why singular they has made a comeback, not that it ever went away. It's just idiomatic English reasserting itself. Soon we'll forget it was controversial.