If your 10th clause is an unless then you're using it wrong. I agree that unless and the right hand assignment can be used incorrectly but that's not a reason to omit the feature :)
I can't control other people. Neither can you. Unfortunately saying that and acting like it's true are two separate things, and so we are chronically making decisions based on an illusion of control that is unhealthy to the point of self-harm. It just sets you up for disappointment and/or antisocial behavior (eg delusions of grandeur)
We put safeties on missiles. We color code and cover emergency power cutoffs in server rooms. We've started putting finger preservation devices on table saws. But code? Well it's your fault for backing into the shutoff button.
"You're using it wrong" = "People will use it wrong." = "You're going to have to work with people who use it wrong" = "You are going to run out of places to hide their bodies and just have to accept it being used wrong."
The question isn't "can it be used right?". Every bad library ever written has been "used right" by at least the author, even if not all the time. The question is "can we live with how often it is going to be used wrong?"
And we put linters on code.
Status Quo Bias is probably why we don't think of existing language features this way.
It's of course true that we're all likely to work with (or even be) incompetent people, but I really doubt individual language features has substantial impact on the damage they cause.