WashPost has definitely been on a visible decline since Jeff Bezos bought it. Extremely partisan and it tends to argue for the government (infamous "golden key" editorial, etc), rather than against it (in case we've all forgotten by now, that was supposed to be the job of the press). A lot of its articles are also Buzzfeedy and factfree.
The information and narratives governments want you to hear will be freely given in press releases.
All other information has to be found via investigation and possibly won't support or at least add complications and caveats to the official narrative.
So the press giving the complete picture to the masses does have a adversarial component to it.
No, it's more than that. They're the "Fourth Estate," supposedly to keep the government from abusing its power. They've abandoned that position. It's not clear that there's anything to replace the accountability they brought for a time. The Internet could have been that, but they've co-opted vast swaths of it already.
In that case, you might as well shut them down and at least let businesses and politicians pay for their PR. There is no public interest in re-printing press releases.
Amazon definitely has a significant problem with selling both dangerous products and counterfeit products. The move to paid listings has exacerbated a long standing problem with poor quality and fake products (not counterfeit but things such as "Egyptian cotton" sheets that are neither.) There is a big incentive to try to become as government friendly as possible.
