Is 100 lives that bad? This [1] source says 250,000 workers were estimated to be working on it in 2003 so we could estimate 5 million worker-years for construction. That's an annual death-rate of 0.002%. By comparison this [2] source says the average death rate for 30-34 year old males in the US is about 0.2%, or 100x more likely.

1. http://edition.cnn.com/2003/WORLD/asiapcf/east/06/13/china.t... 2. https://www.statista.com/statistics/241572/death-rate-by-age...