Bad news sells. There is always some bad news to print so you hear about it. That doesn't mean things are bad though.

skill issue. Solved by having the correct model of the world and forces acting on it given (appropriately weighted) current context and your usual variance.

It's usually people who don't understand the context or assign appropriate weights to events and allow randomness that complain about not understanding markets.

For a selloff to happen, investors have to believe there is a better place for them to go. At worst, any bad news right now is making everything look equally bad, so there is no advantage to running away from Wall Street in particular.