We should always believe what people say about their gender, even if it against what we see with our own eyes. A man who says he is a woman should not be ridiculed, but handed a dress.
Likewise, when someone says there are insects burrowing into their skin (that we cannot see), we should not treat them for psychosis, we should spray them with Raid.
And what about the singer with normal vision who wants to be visually impaired because inside, he's a great blind musician like Blind Lemon Jefferson, Blind Willie McTell, Blind Willie Johnson, and the sightless immortal Doc Watson?
Respect! Inclusion! Diversity!