An assumption. Besides Autodesk is trying to phase out Max with Maya being the standard. It's an old assumption that 3DsMax is the modeling standard, sure it was great back in the day, now its just a matter of preference and old industry heads thats used to 3DSMax. The Maya platform has more utility, from modeling, animating, rigging, and doing UVs because at the end of the day its about keeping within the ecosystem to prevent many headaches from converting files and incompatibility. As for modeling in 2021, Modo is the hero.