It's an easy thought experiment.
Do you think that the most successful web companies in the world with arguably the best people i.e. Amazon, Facebook, Instagram, TikTok, LinkedIn, Pinterest, Youtube, Netflix, Snapchat etc. have no idea what they are doing. That the highly complex, expensive and latency impacting recommendation systems could be replaced by trivial sorting.
Or maybe they do work, do translate to increased usage and do significantly impact revenue.