almost every home computer you buy is running Windows Home edition

Windows Education is fairly common on laptops (kind of a hybrid between Pro and Enterprise from what I can tell). But even in the case of Pro it would be up to the OEM if you’re buying a pre-built. This would mostly only affect people who have gone out of the way to install Pro themselves, and don’t know how to bypass it (although maybe some prebuilts have it used as an oversight, or intentional feature).