Even if bogus , if it makes idiots stop & have a think, then it has done some good.
As for blades coming apart. another reason why I do not touch World Lawn products is I came across a blade that suffered a brittle fracture right through the mounting hole.
On the way out it took both of the other blades with it and one ended up better than 30' away in the side of a truck body.
All 3 had suffered a brittle fracture which looked suspect to me so I dropped it of to an old collegue to test.
It was as I suspected , plain high carbon steel, the stuff they make cheap taps & dies out of because it is hard & holds a good edge.
Unfortunately it is also brittle.
Mower blades are generally made from Boron steel and nitrided to make them tough so they bend rather than break.