Because it's all just gob. Parliamentary gob, media gob. Nobody is going to leave the European Union like that. Only the people who will never be prime minister say that
And it's not just money. The Irish border does actually need dealing with.
Ireland or the Irish Sea, and in either case the government collapses.
Border in Ireland, she won't get a withdrawal agreement through Europe, and border in the Irish Sea, she won't get it through parliament.
And she has spent three years - three years! - coming up with garbage about "grand bargains" and god knows, trying to solve a problem by mere word noise.
Border in the Irish Sea - DUP says no
No border at all - Brexiteers say no
You could just sit there waiting to get kicked out, and I'll tell you exactly what happens then. After about three days you ask if you can revoke your notice anyway