Why does Apple want to make these mats at all? It is technically and aesthetically just nonsense (charging time, aesthetics, larger form factor than mains adapter and cable). This is where the Apple marketing team, which I otherwise value, failed completely IMHO.
Not so. You missed out ergonomics.
if you were to have a mat occupy a bedside table and the ability to lay your multiple apple products on it without a heap of cables will actually look and operate better for such a task for example.