On the trick of using all three positions to tighten a chuck:
Yah it makes a difference.
Will you see this difference in woodworking?
That's a joke, , , , , , , , right?
This is in a hobby class drill press or a wood lathe right? We aren't talking Moog boring machines.
The difference is two fold: (1) tightness Try tapping a 3/8-16 bolt hole in half inch thick 4140 steel with a keyed chuck to hold the tap and you will find it necessary to apply the key vigorously to all three stations and (2) accuracy which accuracy is so small (in a good chuck) that you won't ever see the delta. And for sure in wood you won't ever ever ever see it at all. Maybe with a hunk of Chinese garbage you'll see it, but if you are running a Chinese chuck, well don't ask me for advice because my first advice will be to toss that metal-ish butter substitute in the garbage can
As to the whole accuracy thing. It's a relative term.
Woodworkers can't work to the same kinds of accuracy as do machinists because of the equipment and the materials. They don't need to because they rarely deal with tolerance stack and certainly not in critical ways ( oops critical another relative term). Breath on a hunk of wood and it changes shape. Metals move with temperature, but it's all predictable using a formula and the movement is nothing like wood.