Because they're giant applications that do a lot under the hood that you don't see. Of course you can write your own, we did that during my degree but it was extremely basic.
Yeah but there are definitely games that are terrible with extreme marketing budgets that sell really well, that's a lot of triple A games in a nutshell
Stop clicking, interacting, hovering or looking at the thumbnail for too long. Clear your watch history. Search up lots of unrelated content that you enjoy, thumbs it up, subscribe to unrelated channels you like. It will stop doing that. Mine basically only shows video essays an, science, technology and gaming content
Its literally a post-scarcity socialist utopia on Earth