If not done with skill and precision the end result is often a blade that has lost its mmmm...symmetry (?? ) = bevels that should be straight have become rounded. A blade like this will not cut wood well, even though it might seem sharp in tests.
Perhaps I am not understanding you correctly.
Are you stating a convex edge
will not cut wood well?
All my go to woods blades are flat ground with a final convex. They perform well with fine work. Notches, trap triggers, spoons etc. As well as being stong enough to handle batoning.
Although I don't really "polish".I only go as high as 1000 grit wet/dry paper with a final strop on my jeans.
EDIT TO ADD PICS.
I had never thought to "split hair" before reading this thread. So I took my EDC out and touched it up, since I hadn't sharpened it in a few days. About ten passes each side on a foam pad with 1000 grit and a quick strop on my cargo pants.
Please excuse my poor macro skills.
Convex edge on my EDC. (Rounded final bevel)
As I said in my post I don't really try to polish. But the green tint on the edge of my knife is the reflections of the pine trees in my backyard.
And the split hair test.
JVoultilainen...please don't take this as a slight on your tutorial. You have shown you have mad sharpening skills.
Just don't count out a properly done convex edge.