Hey, just found out I'm on HN thanks to the Raku blog.
What I meant with terrible package management is shared by all scripting languages. Having all dependencies always requires some sort of setup. Many scripting languages try to address that, e.g. with tools like pipenv, but things rarely work flawlessly. If you use a scripting language, you have to bother with this when you want to use the program, and I find that annoying. Rust does this to you too, and also there, it doesn't always work flawlessly, but at least that's a compile time problem. Once you have a binary, you don't need to deal with that anymore.
If you cannot just run a script, scripting languages lose most of their appeal. At least for me. And package managing has exactly this effect.
PS: also thanks for pointing out how to reduce that to two lines. :D