Why does comfy handle input as a single folder?

[Symbiomatrix]

If input were an addtional key in folder_names_and_paths instead of some special directory, any nodes could simply access whatever they wanted with two lines:

        files = folder_paths.get_filename_list("input")
        # Further filtering options:
        files = folder_paths.filter_files_content_types(files, ["image"]) # OR video, audio etc.
        files = folder_paths.filter_files_extensions(files, preferred_extensions) # Specific list.

Instead, everybody inlines their own access, comfy included:

        # Comfy.
        input_dir = folder_paths.get_input_directory()
        files = [f for f in os.listdir(input_dir) if os.path.isfile(os.path.join(input_dir, f)) and f.endswith(".latent")]

        input_dir = folder_paths.get_input_directory()
        files = [f for f in os.listdir(input_dir) if os.path.isfile(os.path.join(input_dir, f))]
        files = folder_paths.filter_files_content_types(files, ["image"])

        # VHS.
        input_dir = folder_paths.get_input_directory()
        files = []
        for f in os.listdir(input_dir):
            if os.path.isfile(os.path.join(input_dir, f)):
                file_parts = f.split('.')
                if len(file_parts) > 1 and (file_parts[-1] in audio_extensions):
                    files.append(f)

Why? I see no advantage to this. Prevents multi folder usage which is otherwise well supported. Output / temp is understandable, comfy needs to write to a single location, but afaik nothing vanilla writes to input.