Here's something i don't understand about sites with a lot of discoverable content: Why do they almost never allow the user to hide content they're unintereste

Here's something i don't understand about sites with a lot of discoverable content: Why do they almost never allow the user to hide content they're uninterested in? In game stores for example, only Steam allows marking games as "not interested". GOG has wishlisting, but no hiding. As a result i never try to explore GOG because it almost only shows me stuff i don't care about. Youtube Gaming does the very same thing with their left-hand menu. You can favourite games, but you can't hide games. Why do sites do that despite it actively hurting them? -- Wow, they have this big front page, with a nice thing at the bottom talking about cookies. However only once the user clicks on a thing does it tell you: "Live Streaming is not available in your country due to rights issues."