There is no incentive to weigh news as proportionally more or less important. Indeed, it takes some time for some news to be shown to have had a disproportionat

There is no incentive to weigh news as proportionally more or less important. Indeed, it takes some time for some news to be shown to have had a disproportionate impact, so that is part of the problem. But news outlets are even more strongly incentivized to highlight the current as the biggest, most urgent problem, over and above curating and continuing to examine trends and events of the recent past.