Yeah, right. If California joined they’d be subsidizing health care for the rest of Canada through transfer payments since every province would be considered a “have not province” compared to California.
This is like inviting your billionaire uncle to move in with you and also open a joint bank account.
Edit: just to put some numbers on my point, the GSP (gross state product) of California is $4 trillion, nearly twice that of the GDP of Canada which is $2.18 trillion. Canada’s economy would effectively triple in size by bringing in California.