There's a reason we can't just have one.
The more sugar you eat the more you need to eat to taste the same level of sweetness. Just be highly aware the next time you eat ice cream. Notice how sweet that first spoon or two tastes. Then notice how the subsequent spoons just don't have the same level of taste or sweetness, as if your taste buds have become numb to the taste of the sugar. The more sugar you eat, the more you need to eat to keep tasting the sweetness. That is part of the addiction of sugar. The increased energy boost is another part of the addiction of sugar. The increase in short-term energy leads to a real let down, increased fatigue, and depression in the medium and long term.