Because you are staring at the pain rectangle and being bombarded with every bad thing that is happening in the entire planet nonstop.
Your ape brain was not meant for this. Imagine if you lived in the 1300s -- Plague, famines, wars, pogroms. They had it all. But any one human being would only ever hear about whatever bad things were happening near to them.
Both can be true.
F'course, pills won't fix society, but medics can't really fix the social systems. Best they've got is pills that make you not want to die.