Debian is not afraid to create its own version of default configuration. Take some mail software as example.
Arch on the other hand is most likely just going to ship original application configuration.
Debian might be nice and easy, until configuration change is necessary. Suddenly, original application documentation doesn’t apply. Debian documentation may be obsolete or absent. And that is the beginning of reading all of the configuration files. Normally, it is not a problem until something like email system configuration is necessary.
That’s when Arch philosophy of making fewest changes to software comes to shine. Original documentation usually works and applies well.