The reason for non-GHC boot dependencies

Hi devs, I had a chat earlier today with someone and found myself unable to explain the reason why GHC came with boot dependencies like xhtml, that are dependencies of Haddock and HPC. Obviously, the binaries are (haskell-)dynamically linked when distributed, but what is the reason why haddock, hpc, etc can't be (haskell-)statically linked when distributed? Surely the size of binaries can't be the only concern, otherwise we'd use upx¹ on them when distributing them. Cheers, Hécate 1: https://upx.github.io -- Hécate ✨ 🐦: @TechnoEmpress IRC: Hecate WWW: https://glitchbra.in RUN: BSD