Because it doesn’t work on other systems, like atari 5200, vectrex, coco, atari 800, apple2, amiga, etc….. There is still a real need for the original scraper.
The computer ones are the worse, because of multiple different releases of the same program.
My pi setup is very computer centric, being housed in a commodore 64 unit, using the original keyboard, and having a custom coco joystick interface for coco and apple2 games, dual db9 joysticks for atari 2600,800,commodore,amiga and then 2 wireless 360 controllers for newer systems. Currently I’m using a 120GB ssd as storage.