Fun fact: Unix used to work in slightly this way. You’d see something neat on comp.sources.unix, download it, and if it was useful, deploy it on your site for your local users. A bit later, huge FTP sites with everything ever written for Unix were routinely used as package repositories are used today. Modern Linux (and other Unices) distributions, with maintainers, strict inspection, limits on what programs can do, etc. came as a reaction to the obvious problems with that. It always seems to me that language-specific ecosystems like PyPI (RIP Cheese Shop), NPM, crates.io, etc. have not yet learned this lesson.
