The point about not having it in a component is valid. It happens all the time that a margin on a component is different based on context. But there is no need

The point about not having it in a component is valid. It happens all the time that a margin on a component is different based on context. But there is no need to make it any more complicated than a margin -- just add the margin externally and if your framework can't do that, add a wrapper and put the margin there.