The asymmetry between the costs for the returns process and the 'happy path' of sales is such that even a relatively small percentage would throw a giant spanner in the works. You need to sell three more to make up for one return or so.
I have a Philips smart TV. I didn't connect it to the internet. Every week it nags me with a popup message telling me how much I'm missing if I don't connect it.
Technically, it's not defective; it still works without the internet. But think about it... What if the nag would pop up daily? Or every hour?
