But why though? .env (the library) has never made sense to me. There should be a singular binary called dotenv that then takes a command+args as arguments that

But why though? .env (the library) has never made sense to me. There should be a singular binary called dotenv that then takes a command+args as arguments that then runs that command with the .env file's values in the environment. Why do runtimes need first-class support for this?