That is where point #3 comes in, being that Iphones are/where not very popular in Brazil (due to being prohibitively expensive), it is safe to assume that a significant number of sales are going to be first time Iphone buyers, who don't have a previous lightning cable.

It all comes down to: is the average buyer be reasonable expected to already have that fundamental piece at home? And in Brazilian market the answer to that is a clear no.