Why?

Many people do not realize how dull their knives and tools are. This leads to people discarding perfectly good knives and tools that could work wonderfully with a good sharpening. When a knife is bought from the store or online, it is often not even as sharp as it should be out of the box. For a relatively low expense, getting a knife sharpened will make the experience of using it so much better. A knife that is sharp is even safer than a dull knife. A dull knife is likely to slip when cutting harder fruits or vegetables. This can cause the knife to be deflected into the users hand and cause injury. A sharp knife that bites into what it is cutting is much safer because it is more controllable and does exactly what the user is expecting it to do.