You aren't going to have a whole lot of company. All of the major style guides have given it the nod because they are practical.

It's a weakness in English, lacking a unique indefinite pronoun - so we're probably stuck with "they" unless a neologism sticks.

i have so much trouble with they as singular because ESL + romantic language with no genderless pronoun.

i always call users "he" because user is, by default, male in my native language.

Intended by whom?

You could potentially get fired, but I don't think you employer will actually end you for it.

If I were to die on an English-related hill, I would probably pick one that didn't put me in opposition with Shakespeare.