Agree with everything, except this part.
Some of those poop knives aren't even remotely properly heat treated, if at all. Practicing on those, just a waste of time. They never get sharp.
These unhardened knives are very good for practicing deburring, that is, moving the knife along the workpiece with very little pressure. It will immediately become dull if you start cutting something hard with it, but you can sharpen it sharply. I remembered the video, the man made a knife from rice flour
There is no need to be afraid of modern super steels, today I received a knife made of S30V from a friend, it was dull (they cut food on the plate), it was as easy to sharpen as my Case made from their CV steel (1095 + little chrome and vanadium). I used regular carborundum Norton Crystalon, with diamonds it would be even faster. Here is only the middle stage - fine carborundum, before that, first the rough side of the stone, after - a piece of fine india stone. Interestingly, it had a small burr, which was more difficult to get rid of than on the Case, apparently due to the greater strength of the steel
In my opinion, the main thing is a satisfying result. If a lingering V-sharpener made of tungsten carbide suits a person, then we can only be happy for him, or if other man likes natural Japanese water stones. The only thing I would advise them all is that they need to control the result during the process (magnifying glass, tactile sensations on a nail or a piece of paper or something else). This will allow you to stop at the right moment without wasting extra time and removing excess metal
Ah, well, since the topic is about tricks, then a good option for stones that it is desirable to lubricate with oil (carborundum, aluminum oxide, Arkansas, washita, etc.), use this soap, it protects the stone just as well from contamination with steel powder as oil, but it's easier to wash off later and doesn't damage the skin
But I haven't tried it with Japanese natural stones, I don't think I should, it still contains a little oil and it can ruin the stone