Er... Surely it's because there is nothing to *bonk* in most territories
I bonk whenever I can. Being in the UK that largely means Oyster and NFC enabled bank card transactions. I don't have any other bonkable available tech - and am not aware of any that are widely avaialble. I have an iPhone 6 too, and have never bonked with it.
Does that mean that Apple have made a mistake? No.
It just means that because ApplePay isn't available yet in the UK I cannot use the most bonkable tech with my iPhone 6. I have no choice but to continue using my card.
Either this analysis is exclusive to the US, and therefore limiting to one of the least advanced card bonking markets, or is global and therefore ignoring that the rest of the globe doesn't have ApplePay. Either way it's therefore largely irrelevant.