It depends 
It might be fine to know that the container takes 30 different types of data, or maybe you know it takes 5 types of data (5 methods) that happen to split out to various combinations of those 30 controls as required, or maybe you just pass it any old data (1 method).
This is why I often use computed properties, then I can just pass along the updated User object, or maybe the new CustomerInvoices array.
As you’ve seen there are many ways to pass data to a black box container, and many reasons for passing it.