Why is the rice I cook with a rice cooker not like a grain of rice in a restaurant outside?

If you add too much water, another thing is that the rice you choose is different. The rice you choose in the hotel is generally long grain rice. Is it yours? If you add less water and cook for the same time, then the rice will not be so sticky, that is, one grain at a time. Another point is that steamed rice will be served immediately, so don't put it in the rice cooker to cool it.