[1]: https://en.wikipedia.org/wiki/Singular_they
"I had a great teacher at school" "Oh really, what was their name?"
etc
"that's a great point" would suffice
wouldn't you agree?
It's a weakness in English, lacking a unique indefinite pronoun - so we're probably stuck with "they" unless a neologism sticks.
i always call users "he" because user is, by default, male in my native language.