For many things it’s about the constant exposure for years and years. Walking past workers doing this isn’t harmful whereas immersing in it day in and day out f

For many things it’s about the constant exposure for years and years. Walking past workers doing this isn’t harmful whereas immersing in it day in and day out for years is harmful. X-rays are a good example. They would be harmful to an operator that doesn’t take precaution but they are harmless to patients who only have limited exposure their entire life. We see this with many things but activist/special interest groups often distort the risks to persuade people to support their cause. Roundup comes to mind.