Why do you have to wait a week to use the bootloader?
Its a software limitation, you can’t unlock the bootloader immediately. After a week you probably have stuff on the device so you might not want to unlock it anymore
Or it might be a security thing so retailers can’t unlock stuff they sell so easily and put their own software on it
It’s mostly the installation and initial setup that’s a pain on arch, so definitely not a beginner distro, but very good nonetheless