It's not uncomfortable and inconvenient. There are many times when it's much more convenient to reach for the screen than to reach for the mouse or touchpad and carefully move the cursor. Touching the screen directly is much more natural for the occasional interaction. For prolonged use, nothing beats the mouse (and yet laptops still come with a touchpad and sometimes a clitmouse).
Carefully move the cursor? Come on. It is a subconcious action. How do you think people play fps games? Do you even use a mouse yourself or maybe have some physical disability that impairs you?