SOME of us, IMO many of us, would use a stylus that worked on the iPhone. Especially folks with XL hands like mine.
I am one of those with limited usage of the AP2, but that is not because of the AP2, it is because the pencils only work on tablets with their larger displays that already often work fine even with large hands. The smaller size of phones plus the wide variety of apps today scream out for a stylus.
Steve dissing styli for old iPhones was a totally different usage environment. So please do not waste bandwidth quoting Steve Jobs referencing now-ancient devices.