It was only one example, sheesh...
The point is that, much like the uncanny valley, it's often the little things that break our suspension of disbelief, not the big things. We can take superman just fine, but we go 'wait a moment!' when he picks up a car by the bumper.
Elves, orcs, trolls, and such are easy to take - alternate evolution. *shrug*. Wizards operate by unknown/unknowable rules. So we accept that they can TK lift a car.
Superman, though, is presumably trying to do it by sheer physical force. We don't know how superman's physiology works, but we know that an industrial machine putting the same pressures in the same spots would tear through the car, not lift it.
Summary: it's the little things, not the big things that break suspension of disbelief. As such, it's better to avoid breaking the laws of physics(and behavior) where possible in your story, no matter how fantastic it is. When you do break them, either 'go big' or explain the breaking.