Earlier quoted context omitted.
Singular "they" was one I resisted for a long time, but it's a lost cause. I've had almost the opposite experience from you. I'd long embraced it as the correct word to use when referring to a person of unknown gender or to a hypothetical individual, but having to use it regarding real people caused me problems. When my wife became coworkers with a non-binary person and its usage came up every few days, the better I…
I have no objection to avoiding assumptions about a person's gender. It's unfortunate in my opinion that we chose "they" which is gender-neutral but also plural. That is entirely where the issue is for me. I'd have no objection to a singular gender-neutral word (which unfortunately doesn't exist in English). "One" sometimes works, but often sounds too formal. Or reworking the sentence so that "they" is approprate, e.…
Then ignorant teachers told you that you were wrong and they were so successful in brainwashing you, that even after you have learned you were actually correct, you are still trying to argue you were wrong!