I think they are using the generic “you”, which is an English grammar phenomenon I think is overused and should often be replaced with “one”, the unambiguously generic pronoun.
the act is disrespectful, to refer to human beings using pronouns; by referring to people using fully qualified names, respect and humility is shown. pronouns are a declaration of war on the attributed creature, as immense inferiority is implied. societies created names with purpose – and to sidestep names is to break the fabric of culture!
that comment was a joke (i personally do not feel that way) but i do know people who have a tough enough time nailing down their gender that none of the options really feel right