It comes with a cable that you can use, just not the wall plug. Stop.
i'm sure this has been said in the multiple pages of this thread that i haven't got to yet, but i'd imagine there are a lot of people who do not have a USB-C power supply, including me. i'm a tech person, and while i have things that charge with USB-C on the device side, they are USB-A on the power side. a lot of laptops these days are coming with USB-C, but most desktops still do not. so if you don't have cables already from previous apple purchases, you have to buy a brick.
i'm not effected at all here because i have plenty of lightning to USB-A cables and multiple 5w bricks. but i think there will be a percentage of people (first time iphone buyers, people without USB-C power sources) that will be forced to buy a power brick to use their new $650-$1,200 device.