No, watts. Look it up. Stacking diode 'bars' gets you a ****tonne of power.
https://www.alibaba.com/product-deta...32921.html?s=p
How many passes did it take to cut 3mm? What speed? 10mm/s?
How well do you think that diode will cut 22mm?
The length of CO2 lasers is around 10,000nm, diodes are typically less than 2000nm and the shorter the wavelength, the less suitable it is to cutting organics.
Of course you can cut anything if you hack away at it long enough. Using your logic my Swiss Army knife can fell a redwood, so I must be a lumberjack.