Perhaps real information is harder to source than fake info, and real news is too scant to benefit from that format. Also why papers bury the lead. (To make you read their hard work.) As an exercise go to the BBC and edit the first three articles you find into that format - you will see why they don't want to do it.

I.e. the interests of the readers are in conflict with interests of the paper.

Frankly, if they want to bury the lede to make me read their hard work, then I'll gladly not read the article at all, unless forced to (rare these days).