The term 'Food desert' was used primarily to refer to total healthy food availability within a certain radius, including (especially) healthy food availability

The term 'Food desert' was used primarily to refer to total healthy food availability within a certain radius, including (especially) healthy food availability in supermarkets. Yodsanklai appears to have been referring to the availability of healthy prepared foods, particularly restaurant foods. It is entirely possible to live in an area well-served with supermarkets and bodegas and only have 'unhealthy' restaurants to choose from due to the peculiar demands of that area. You can drive through parts of the US and see nothing but greasy spoons or pub food, while the local at-home cooks have access to a wider variety of healthy foods from the markets.