I have been a wood carver for some years. I use 6-8 different bevel angles, depending on the tool and the load.
There must be enough steel behind the edge for whatever the service. Otherwise it crushes and the edge is called "dull."
Nobody can tell me otherwise. Hate to sound so abrupt and dogmatic but hindsight is 20-20.
Bone cleaver = 40 degrees.
Bench plane and chisels = 30 degrees
Spoke shaves = 28 degrees
Draw knife, elbow adze, carver's adze (Stubai) & D adze = 25 degrees
Pfeil carving gouges, Mocotaugan crooked knife, Porsche kitchen knives = 20 degrees
PacNW style crooked knives and planer knives = 12 degrees.
There are blades with a single bevel on one side. Edges with bevels on both sides. Blades with both edges sharpened, single bevels.
Crooked edges of all sorts, the crooked knives and the adzes.
Microbevels and nanobevels are not needed, softwoods or hardwoods.
The real issue is that there are a bunch of different techniques, all of which lead to the same end results.
There's a learning curve sprinkled with experience for each. No, you can't buy an edge.
I was taught free hand. Took a loooooong time to get good at it.
I can hone a PacNW crooked knife over my knee now.
The best thing to remember is that if it looks easy, it wasn't easy to learn.
Pick one, scrape away and learn it. It's only steel.