I've recently said that Microsoft is the most self-defeating company in history. They often take all of the goodwill they've earned, and then torch it on minor battles that aren't really making them any money. If someone's gotten into the settings screen to change their default, they probably have tried Edge, or at least know what it is and have some reason for switching.
Windows 10 telemetry is a great example: They shot themselves in the foot PR-wise on an otherwise excellent operating system, chasing a pile of metadata that won't really be significantly more useful than what they get from people who voluntarily agree to be Windows Insiders. There isn't a good business case for preventing people from shutting off error reporting, and it's had a huge impact on mitigating all of their other efforts to repair their image.
