Do you drink hot coffee or tea or soup? Cause hot beverages are considered more likely to cause cancer than this designation for aspartame. Do you eat meat? Cause that’s two levels higher than this designation for aspartame.

Sure, these things on their own, at the amount they're generally consumed, may not cause issues. But when you are combining these things, the sum total can be worrisome. Maybe red meat alone isn't much; maybe hot coffee alone isn't much; maybe aspartame alone isn't much; maybe alcohol alone isn't much. But when you have hot coffee for breakfast, red meat for 2 meals, aspartame drinks all day, and alcohol at night, you are at a completely different level of risk. Knowing which small things contribute to this sum is important. Or, from another angle: maybe someone really likes alcohol, even acknowledging the potential cancer-causing aspect. So to somewhat offset that known risk, they're wanting to minimize other sources of potential-cancer.