What happens when an officer takes off his insignia? He stops being worthy of respect.
Bosses who ask their staff to call them by their Christian name are either stupid or hyprocrites. You can’t be friends with people you expect to give orders to; friends don’t give each other orders. Will the boss then get angry when his servants then don’t hop to it when he tells them to?
Our current Pope is playing this game. He is ‘The Bishop Of Rome’. He doesn’t believe in formality.
I recall Paul VI gave away his crown. Symbolically, that sends a very obvious message. And religion is all about symbolism. Even diabolists get this.