Except for when it's actual malice vOv

It could be both. And in many situations malice and stupidity are the same thing.

How can {deliberately doing harmful things for a desired harmful outcome} and {doing whatever things with lack of judgment and disregard to consequences at all} be the same thing? In what situations?

You seem to forget that Hanlon's Razor isn't a proven concept, in fact the opposite is more likely to be true, given that pesky thing called recorded history.

Hanlons razor is true because it’s more entertaining, and our simulation runs on stories as they’re cheaper to compute than honest physics.