Dietary cholesterol has very little impact on blood cholesterol levels - about 80% of the cholesterol in your blood comes from your liver producing it and it produces more with saturated and trans fats in your diet, not cholesterol in the food you eat. Diets high in those fats and other factors such as obesity affect your blood cholesterol to a much greater degree. Almost all cholesterol in food is never absorbed by your body.

As for lead, your exposure is always cumulative, as the body holds on to it forever (it treats it as if it's calcium and never lets it go). So there's no actual "safe" level of exposure to lead. In addition, because of how central calcium is to the operation of the nervous system, when that calcium is replaced with lead, there's a host of lifelong negative effects that result including both physical and mental degradation. Oh, and for women, that lead is passed directly on to their children, who then also have to deal with all the negative effects.

What you said is like if someone said "I'd rather have a little plutonium in my food, rather than too much sugar."