Because it might seem to you that you cannot change it, but if you have Eliezer's do the impossible attitude, then maybe you can.
I can't tell if your misinterpreting him or if he real meant something that stupid. The problem with "doing the impossible" is that it amounts to an injunction to use all available and potentially available resources to address the problem. Of course, its impossible to do this for every problem.
Another month, another rationality quotes thread. The rules are: