Based on this everyone should be skydiving because the risk of death is so small but evaluting choices is a little more complicated than that; the risk is not the only factor and the further reasoning involved also helps determine the relative weighting of the risk in the decision making process. And just because you dismiss these other concerns does not mean they are irrelevant to everyone else.

In simple terms (and this doesn't really begin to investigate the actual complexities of any issue) 1/1000 risk is small if the benefit is really high, 1/1000 is huge if the benefit is tiny.