It does tell us that the CX-5's AWD system will refuse to work in some situations.
I don't know why you say such irrational things. The AWD is working exactly as designed and described by Mazda. The rear wheels can never apply more torque than the front wheels are getting. Even when the vehicle is not moving and the front wheels are spinning, the rear wheels have torque applied to them in an amount equal to the torque applied to the front wheels.
This is not a problem in normal winter driving on slippery snow and ice covered roads and this type of AWD has important advantages over more complicated and heavier systems that can apply more torque to the rear. Specifically, the Mazda implementation does not cause the slight binding between front and rear that can initiate a slide on an icy corner at higher speeds. This is a huge advantage for safely covering ground on treacherous roads. This is one significant reason why the Mazda is one of the better choices for winter travel. There are other reasons why the Mazda excels under conditions that are treacherous for lesser vehicles that I have detailed in other answers.
I think you just don't have enough winter driving experience under enough challenging conditions to know what matters and what doesn't. Your priorities are misplaced and I think this is explained by basing your opinions more on meaningless video demonstrations rather than on actual experience using a wide variety of tires and vehicles with various AWD systems under real world winter conditions. Previously, I owned an AWD Subaru. There are not many places in the world that regularly get the kind of extreme winter weather that I've experienced on a very regular basis for a number of decades.