What you said is misinformation.
It's not brittle.
It's not impossible to sharpen either, you just have to know how to sharpen.
I dont know much about steel. Im learning more... but that video.... Why does he stop the video right when the dull part of the blade hits the paper...? It stopps cutting well and smooth, then the video ends.
Once again, i dont know steel. But that video is odd. Its like someone saying they can do a full backflip, then video ends with him in mid air.