For someone in the upper 1% of chocolate consumption, lead intake via chocolate is unlikely to be anywhere near the top of their list of health risk factors.
In Switzerland the average person is consuming 8.8kg/year (22lb), and the country is quite healthy by international standards. They have the lowest obesity rate in Europe and and half that of America which averages significantly lower levels of chocolate consumption.
I'm one of these ones. Sometimes eating two bars of 98% chocolate per day. Sometimes more.
The fats in it are not unhealthy, and the sugar amount is also very low.