"You can also also download just the llamafile software (without any weights included) from our releases page, or directly in your terminal or command prompt"
There is no cargo-culting going on. Some of us do legitimately appreciate it.
In this specific case there is an option for you that addresses this complaint, where the model isn't coupled with the app.
Is having everything normalized in your system that worth it? I would say having (some) duplicates in your system is mostly fine, better that having some spooky-action-at-a-distance break things when you don't expect.
I expect the future is something like Windows's WinSxS, NixOS's /nix/store, pnpm's .pnpm-store where that deduping isn't "online" but it still is somewhat automated and hidden from you.
Yes? It's right here, at the least.
And if that's the future, then the future sucks. We can teach people to be smarter, but no, instead our software has to bend over backwards to blow smoke up our ass because grandma.
What I suspect is happening is that people are cargo-culting zero-click installations. It seems rather fashionable right now.