>>310772
There's one final use of 'they', which I used myself (and still do) before the woke phase of its use: intentionally obscuring the sex / gender of a (real) person being referenced, under very specific circumstances, with good reason to obscure it. I believe this is one origin which the woke users made their argument, as they are similar at first glance.
For example, if you said: 'A friend told me so-and-so about you maybe needing help.' On the off-chance the listener would infer the identity of the friend being referenced if the sex was used, which is not desired, using 'they' or 'their' here is correct. By analogy, it's obscuring vision *with good cause and little loss in clear communication*.
The main difference is that complexity and ambiguity is being introduced intentionally with very good cause, while with the woke singular, needless complexity is being introduced and causes confusion. The priority of all language is clear communication, with the sole exception being diplomacy and negotiation to avoid severe consequences, which the former accounts for and the latter use-case does not.