If I were close to someone who had been killed in action in Afghanistan, which would I rather receive ? A handwritten letter in poor handwriting and numerous misspellings ? Or a carefully worded letter, computer printed with a signature at the bottom.
Obviously I would rather receive neither – I would rather than someone close to me were still alive. But given the choice between the two letters, I would rather receive the handwritten one with misspellings and poor handwriting. A properly crafted letter that is computer printed is far less personal, and the wording is likely to be very bland. It would also feel like it was a form letter sent to everyone.
As for the poor handwriting and misspellings, a sensible person would not draw attention to that. There are often reasons why someone has poor spelling – for instance dyslexia. And someone with poor eyesight who probably relatively rarely writes by hand is likely to have poor handwriting.