That wasn't my point.
Graffiti is not possible without a stylus, or at the very least is vastly less effective.
Android and iOS are both "finger first" interfaces. You can use a stylus, but you don't have to. And everything is designed around finger-fatness. Icons, gestures, on-screen keyboard.
I much prefer the stylus. You only need to see artist that paint and do sculpting with Wacom displays to see that this has a much better potential than finger-based touch. The latter is ok for light consumption, but for not so much for productivity.