Mostly because they have not managed to come up with a narrative which blames humanity for the core's fickleness and as such don't see how it can be exploited just yet. Once they come up with something it will spread like wildfire and quasi-religious core-mancers will chastise those living in the developed world for their sins against the planet, urging them to give up whatever has been deemed causal. Others will claim the reversed core will be especially harmful to certain identity groups who should be compensated since it is after all the fault of {white men|capitalism|the west}. The narrative will flourish for a bit until it is thoroughly debunked and - important - a new scare has been found. Those who drove the narrative will not lose face nor will they be reprimanded in any way - indeed, they have found a new looming disaster which to blame upon anyone but themselves.