I think the more difficult part writing by hand would be the redundancies -- not only do I have to know which line to put the note on, I have to know which symb

I think the more difficult part writing by hand would be the redundancies -- not only do I have to know which line to put the note on, I have to know which symbol to draw. Which could be tough, as it forces the composer to be consciously aware that e.g. "this note is D#" rather than "this note should be two steps above the previous note in the current key".