I sure would be disappointed if the power indicator light did not work in a nice flashlight like this. A quick search on the internet does not reveal others having the same issue. Certainly this is a bigger issue than a small ding or a slightly misaligned LED, or something you could take apart and fix.
I like what DENGOH stated above, think about the value this defect is on the whole flashlight and negotiate that with the seller. If it’s something you cannot accept, then consider a return. But, as you may recall in this post (Nitecore Warranty - Is This To Be Expected?), returning for a repair may not be a good option.