iPhone backup asking for a password

I backed up my iPhone X to my MacBook Pro locally and specifically unchecked "encrypt backup" to install a clean iOS system. When I went to restore the phone 1 hour later I was asked for a password which I never set. Unknown to me, any likely thousands of other users, even if you uncheck "encrypt backup" if you have checked "encrypt backup" at any point in your life of Apple or if you are using your phone for business and the company installs its own security profile requiring encrypted backups the backup will be encrypted without your knowledge. While it is not the end of the world as most of my data is backed up to the Microsoft Cloud this is an issue that needs to be sorted. While Apple goes out of its way to protect users privacy it is a bit hypocritical to encrypt my data without my knowledge. It could be easily fixed by Apple asking you to verify the password before backing up or perhaps telling you that the backup is encrypted. C'mon Apple get your act together or you might just lose me and many other customers. More annoyingly the Support Agent kept saying I know how you must feel and you must be very upset. It is not only patronising but makes me angry that Apple has known about this problem for years but has yet to do anything about it.