Face it, Apple CHOOSES to make their products the way they are.
Well, that plus they actually have the ability to make things that small, because the 11 year old girls working at Foxconn have fingers small enough to work on something as tightly packed as an iPhone.
it might surprise you to discover that the world managed to create a great many things before keyboards were ever invented. It's hardly a requirement for creativity, and in many tasks is even a hindrance.
May I remind you that Scotty wasn't able to input the formula for transparent aluminum until he was offered a keyboard. Do you really want to own a computing device on which transparent aluminum cannot be created?
Memory fault - where am I?