Debian is hard mode and is an advanced distro. There are a ton of tools that are unique to Debian. It is used mostly for people running their own servers and custom purpose machines from home or work. It is also the primary distro for hacking hardware and reverse engineering stuff that has no other way to create Linux kernel support.
While I get it I don’t agree with the first part. If you install Debian out of the box with GNOME it will work out just fine for the majority of people, usually it will work out better than Mint, Arch and whatnot because it is a finished and very reliable OS, not something targeted for experimentation.