For one, the image above is the quintessential mac, white, neat, minimal, and the model given for our examples is the imac.
I have worked on the older imacs, and opening one of those is not only quite a bit more difficult than opening a dell, you had to have the right torx bit to open them. I called it the "mac extractor". I can't imagine the newer imacs are that much easier. When you open a dell case with just a lever and cram a stick of ram in a slot, that is easy.
THIS IMAC IS NOT AS EASY, PERIOD.