Saying “You’re using it wrong” is blaming the user for using the computer the way it was presented out of the box.
It's also the way we've used computers for nearly fifty years and the way we interact with every other display in our lives. As examples almost no one uses less than the full wide of their TV, Smart Phone, or Tablet. There's no reasons that computer displays should be any different and they weren't until pretty recently.
https://archive.ph/6Xb9o