Arch/pacman packages are quite simple which makes the maintenance burden less. However, when compared to more mainstream distros like OpenSUSE and Fedora, Debian's package recipes are more unwieldy and arcane. Why do we need to put things in the upstream source in the first place? Why do we use scripts that don't make sense and full of legacy in 2025?
I deal with Yocto almost daily, still most Debian packages are a mistery to me. Don't even mention things like getting an almost upstream Linux kernel (like a vanilla release + some patches on top) to be ported as a normal Debian package.