Platforms like YouTube and TikTok already have almost full control of how the majority of users spend their time on their platforms. They open the app, they immediately get a feed of content algorithmically selected to keep them on the app for as long as possible. They don't need to search, they don't need to think about what they want to watch, they just consume. Fully automated consumption with 0 human effort involved.
Well, almost. There's one last thing remaining: you still need humans to produce the content that you then put on people's feeds. Or rather, needed. Now that the actual production can also be automated, those platforms no longer need to put effort into finding existing human-created content that will keep people watching - they can just generate new, algorithmically perfect content. This is their endgame.