I think it is facile to conclude that simply nobody cares. A lot of people care. I care and you care. We're not nobody.
I think the bigger problem is that we have a factionalized mutually exclusive difference in media environments, and consumers of one don't believe environment don't believe the other. One side (RWM) actively and constantly disparaged the journalistic integrity of the other (MSM), which has allowed that side to engage in the exact kind of news fakery they accused the other of, and to get away with it, because they've developed their own version of reality.
So rather than the idea that nobody cares, I think the real problem is that the factions don't trust the same sources, they don't come to an agreement on what's true, then they just retreat to their corners frustrated with the other side for their recalcitrance.
How that relates to the issue of disclosure is that when it does occurs, only one faction cares about it, and the other faction whistles past it as though it didn't even happen, because they can't agree on the source of even that information.