Can you successfully sharpen using a high speed grinder

[Bob Hallowell]

It's all I have ever used

[MichaelA Cooper]

Oh man, am I gonna catch it for this post!
Why do you guys use grind stones to sharpen your tools?
I used to be a knife maker, and hope to be one again soon, and we use belt sanders to grind blades and sharpen them.
You can't get a better edge on a knife or chisel than using a belt sander. Knives I made years ago still have a razor edge on them. Just use the right grit belt and keep a bowl of water around to dip the tip in so it doesn't get too hot. You don't need any chisel rests or fancy holders or any of that stuff! I know this goes against everything written but it's a simple fact!