I disagree Gordon, why? Well, when you see Eli Avisera or Jean-Francois Escoulen step up to the grinder and then step back, 20 seconds later, with a perfect grind on the gouge, as good as any jig can do it, well, that is something to shoot for. Dunno if it will happen anytime soon, but it is a goal worth working towards.
I have a 1/2" bowl gouge that is really too short to use, but I am going to remove it from the handle, so I can practice with it just the short piece of the tool left, otherwise, I'll get a half inch bolt, and use that to practice on
The beauty of hand sharpening for the pro is that it is dead quick, and they can sharpen on anyone's grinder anywhere, they don't need a jig. Yes, I know, I'm not a pro, nor will I be traveling to do any sharpening, but still, it is a skill that I will want to master at some point.
The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails.
William Arthur Ward