Do not treat a broad product claim as a measured result for your household. The amount of avoidable food waste, water and electricity use, and the local treatment and collection routes all affect the comparison.
What the observation tells you
A working disposer does not make wasting edible food beneficial. Nor does it justify sending fats or unsuitable materials into drainage. Manufacturer descriptions can explain the intended process, but they cannot describe every local wastewater system and food-waste service.
A useful next step
Prioritise preventing unnecessary food waste and follow the operating limits of the equipment already installed. Seek local collection and treatment information before making a specific environmental comparison or purchase decision.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.