My reading comprehension skills apologise for the inconvenience.
That restriction is only for the Prelude story line, I cannot speak to the game proper once it kicks off. I can say that without any magical skill you will be in a very tough spot to do anything beyond simply standing around at the right point in time.
Lets say for instance that eventually a master of fire finds you. He throws a village size fire ball as hot as the sun at you, how do you survive? I'd be hard pressed to find a way to write out of that one. You'd be burnt to ash in moments.
