We do not consider people who suffer from dwarfism a separate species, they are humans with a condition which limited their growth. People with Hypertrichosis are not seen as a separate species either, they are humans who show abnormal hair growth over their bodies. People with Syndactyly are just as human as those who do not have webbing between their fingers or toes.

In short, the presence of abnormal conditions does not create separate categories nor does it void existing categorisations, it just means that the individual who has that condition differs from the normal in some way.

Calling genetic abnormalities in sex chromosomes separate sexes makes about as much sex as considering cancer a developmental stage.

Yeah but it's a matter of perspective. It's logical that the majority matters so much more, won't someone think of the majority? Majorities have rights, too