I guess that's true. I thought that the blend radius would be interpreted as an increase in the area moment of inertia. To get an estimate in the first approximation, I calculated the bending beam with Bernouli beam theory (Sigma=M/W) without rounding at the root. H=B=378mm; L=2268mm(up to blend edge); F=893N; Radius=189mm; L_max=3005mm
Using Bernouli beam theory, the maximum bending stress at the root should be smaller.