It's true and I think an other problem is that "uplifting news" generically is kind of a lower common denominator: it's easy to come up with an actual newsworthy information that would be almost universally considered terrible but harder to find something that everybody will find uplifting.

Country X allows abortion? That's going to make people angry. Forbids abortion? Now the rest are angry. A new law that makes polluting more expensive? Surely that's uplifting... unless you have to drive your car for work and you end up losing money because of it. It rains a lot? That sucks. It doesn't rain enough? Now farmers are complaining about the crops.

Completely untainted positive news are hard to come by.