What is the purpose of this plugin?

This might sound like an odd question to ask, but I don't understand the need for this plugin, can you explain? There is [another plugin](https://github.com/yarnpkg/berry/tree/master/packages/esbuild-plugin-pnp#yarnpkgesbuild-plugin-pnp) that looks similar but after using it, all it did was to include all dependencies in the bundled file.. What am I missing?