"Wiping data: when I saw the "securely destroy my data" checkbox I ticked it. Why would you not tick it?"

Others have noted that it is ticked (I don't know).

But I will say that as a marketing move it's a good idea. Because you are actively informing users of something that they might not have thought about or that competitors don't mention or mention in a way that is ignored.

Amazon does a version of this with shipping. They allow you to select slower shipping for the same price as the default fast prime shipping.