Personalisation isn't inherently bad. For example, I have zero interests in sports, and I don't think I'm putting myself in a "bubble" for not wanting any sport

Personalisation isn't inherently bad. For example, I have zero interests in sports, and I don't think I'm putting myself in a "bubble" for not wanting any sport related articles in my feed. I also may have niche interests, such as puzzle games, which a generic feed would never surface. Where AI gets dangerous is focusing on either a single source, or providing one side of the story, but that's exactly what "Full coverage" attempts to solve as you mention.