He didn't loose money. He didn't receive the POTENTIAL author reward for that post. You see how these two are diffeerent?
Again you are mistaken, it is a personal attack on a persons ability to earn on the platform for doing nothing more than expressing an opinion.
That is never ok
In fact when an account down votes another account without first engaging in an attempt to resolve the issue through conversation, it is abuse.
Very true. There are lots of things you can do. But that doesn't mean you should do them. For an example you can walk into a school and shoot the kids down. The gun doesn't lock itself. It fires all the bullets. Ability doesn't mean it's a Right.
Before spreading misinformation, you should probably read the rules and FAQ's of this website, especially the part that talks about downvoting. I posted that part here.