It is too intimidating to change for one. Most users I deal with are terrified and bewildered by settings and can't even take the few steps to install an adblocker (and they want the adblocker!)

And from the article: "Technician's know how to get around this, but not everyone using a computer is a technician."

To use an alternative, you need to know someone with the knowledge and ability and able to request their time. Backing up data, burning USB sticks, installing, setup new backup solution, resyncing bookmarks, creating shortcuts to their email, replacements for the apps they use... all the details takes a lot of time, and it is ongoing work. Someone has to become 'the technician' and provide support. Otherwise, people have no option except to keep bumbling along with the default or somehow become 'the technician' themselves without any guide but web forums and ChatGPT.