To be fair, if all you want is a package with Debian you can do that too. Just copy files in to a dir(like package() in your Arch example), write a 10 line DEBIAN/control in there(like the preamble in your Arch example), and call "dpkg-deb --build". The linked document is describing something different, joeyh has a short "why?"¹ from years ago that may be helpful.