Personal pronouns in the workplace

[the other bob wilson]

Isn't it the correct way though if you stick to the rules of the English language?

Calling a single person they, they is plural isn't it?

I know it doesn't sound nice and I understand not wishing to be called it, but it is the right word.

I take your point, but I’ll always think calling a person it is either an insult, a joke or a mixture of both.