Imagine a nicely formatted table of Netflix movies and shows available in your country. New, potential users can quickly find out if it's worth signing up. Existing users can quickly realize that maybe the service is not worth it.
I also have a theory that if you're stuck looking for something to watch and you've already spent enough time on their platform, you might just settle on something.
They're trying to stay as the "first stop" of when you want to watch something, and the only way they can keep that position is purposefully being murky with their offerings because, yes, it's a 90% shitty collection.