Rice is the default staple for most households, but it shares the table with corn, cassava, sweet potato, and noodles in different regions. What matters is the amount and what comes with it. A smaller portion of rice with more vegetables and protein behaves differently from a large portion eaten alone. Adjustments are usually about proportion, not removal.
Beras merah, red rice, is one example of a staple that varies the texture and colour of a plate without changing the meal's shape. Some households mix it with white rice for a first step. Others keep white rice and simply measure less of it while adding more vegetables. Both approaches are workable because neither one asks the kitchen to learn a new cuisine.
The practical question at the table is simple: what sits next to the rice? If the answer is a protein and a vegetable, the plate is already doing useful work. If the answer is rice alone, that is where the adjustment lives.