My guess would be it has biological/physiological reasons. Negative stimuli create a greater urge to act. Tabloids selling more newspapers with bad news than go

My guess would be it has biological/physiological reasons. Negative stimuli create a greater urge to act. Tabloids selling more newspapers with bad news than good ones, because the individuals that gave higher weight to birdsong than the signs of a predator approaching did not procreate, evolution at work. It is possible to change though, patiently putting your own focus on positive things, which there are so many of. Takes work, but sooo worth it. Life is more fun that way too.