Yes, but we're not talking about a vulgar name, we're talking about a person that presents as female, has a female name, looks female, but was born a male, who

Yes, but we're not talking about a vulgar name, we're talking about a person that presents as female, has a female name, looks female, but was born a male, who simply wishes people would adress her as a "she". This is not burdensome. This is not onerous. This does no harm. Just honour her wish. Why wouldn't you?