Yeah, I realize that. Just saying that when I ordered for delivery payment details were required. Makes sense to do both. Seems a little strange not to require payment details for store pick up.
That is because home delivery is buying the phone and having it delivered. The in-store pick-up is not buying and having it delivered to store but reserving a phone that is already at the store. You don't give payment details because you haven't bought it, just got Apple to hold it for you on launch day and if you don't buy it on the 25th it will be made available to anyone else to buy on the Saturday.