"Typos are very important to all written form. It gives the reader something to look for so they aren't distracted by the total lack of content in your writing" says Randy K. Milholland.

T-Y-P-O-S! 

The word can literally make or break things in the industry that we function. While being grammatically uber-correct is insane to demand, but there are many jobs that typically depend on being correct or rather 'spelling-out' things correctly. To give a simple example, say the healthcare industry, and so on. This was just a small illustrative example to show how a syllable here or there can turn around human lives.