Sure, but you shouldn't need to develop on the phone itself. Where's an Arduino-like IDE that I can run on Windows or Linux to develop for iPhone? Should just be able to connect a USB cable and go. Where's the Python support?

Of course smartphones are mainstream so most owners are users not potential developers.. unlike the late 70s/early 80's computer scene which grew out of the hobby electronics scene where the early users were much more technical. My first computer came as a kit - bag of components and a motherboard - had to get out the soldering iron to build it.