Why don't use CBN wheel for knife sharpening?

[SHARPCO]

Searching around CBN wheels on bench grinders are used for profiling, but not so much for sharpening.  But, https://www.mefe.com.au/power-knife-shar...cbn-wheel/

I don't see why it wouldn't work, but it may be pretty aggressive on a high speed grinder.  It would probably work better with and adjustable speed bench grinder that could be slowed. Additionally a device like the Tormek bench grinder attachment would be needed to maintain a bevel angle.  

For whatever reason I don't see a lot about it on-line.  I imagine that if you search around a bit you will be able to answer your question.  Interesting idea and question though.  Maybe someone who has tried it or who knows will post.

Thank you. The machine in the link reminds me CATRA sharpener. 

http://www.catra.org//pages/products/sha...asharp.htm
http://www.catra.org//pages/products/sha...lei100.htm
http://www.catra.org//pages/products/sha...elM140.htm
http://www.catra.org//pages/products/sha...elU200.htm

And M140(fourth one) is the same with the machine you showed me.