Earlier quoted context omitted.
To outright dismiss the possibility of chance affecting people's lives for a cute one-liner is pretty silly.
To summarize, the link says that luck is real but you are better off thinking that it isn't real since that will affect your behavior in a more positive way. Still not sure I agree in this case (you can think luck is real bit still behave optimally) but it could be a helpful way to think in other scenarios.
Once you get into any specific situation and you need a higher resolution view of things then you can look at the situation as it should be looked rather than defaulting to the low resolution view that luck doesn't matter.