The world isn't completely a harsh place, not even close, and doesn't have to be. Although, you could be posting on HN from a war torn, famine ravaged country, I dunno. Anyway, maybe you could try making the world a slightly less harsh place, if that's how you really see it. And if it is, I'm sorry you've been brought to that conclusion.
"You must be the change you wish to see in the world." - Mahatma Gandhi
You're mistaking "the world" for "middle/upper class US". Horrible things happen every day to people who don't deserve them. Ignoring that is ignoring the struggles of those people, every day. This isn't a US-only forum, people of many nationalities and countries come here.
Softening your language makes it easier to pretend these people don't exist.
"That's why they call it murder, not muckduck." - Dwight Schrute, The Office
"You must be the change you wish to see in the world." - Mahatma Gandhi