You stated "you have to have a birth or death date." But according to the Help section on this page...
https://www.wikitree.com/wiki/Help:Date_Fields#Date_Status_Options
...it states each date field has a status indicator next to it, and one of the options is "intentionally blank." Additionally it states "If you know a person is living, select "blank because living" by their death date."
I am trying to enter a living spouse of a deceased uncle. (This is a former spouse, of whom I don't have access to their information. But I want to enter them so that I can then add a child of my uncle and this spouse. And yes, the child--my first cousin--is living [adult] but the reason I want to add them is because they are a DNA match for me, and I need to reference their Wiki code for my DNA sourcing). (And yes, I know living people are marked as private, and yes I know that I will only be displaying their initials when I create my source entry). I don't know the living spouse's birth date (not even an estimate). So WHY can't I create an entry for this person without filling in their dates, when the Help screens specifically tell me that I should be able to?