rationalskepticism.org

I don't see the issue. I think it really stems from people thinking that 'luck' has anything to do with causation. Anything with random factors, i.e. a degree of chance, can be described as luck. When you put your chips down on the roulette table, there is a limited number of outcomes, and most of the factors can be accounted for, so there is causation all the way down the chain, but the outcome is still statistically independent, therefore random, therefore driven by chance, thus luck. Genetic mutations and specific environmental triggers are no different.

Yes, it's a semantic issue, stemming from the fact that people have no idea what the word 'luck' means.