What, exactly, is confusing about it? It's just how it works, and there are good reasons for it. Screen allows you to do some cool things like keep your session

What, exactly, is confusing about it? It's just how it works, and there are good reasons for it. Screen allows you to do some cool things like keep your session running when you log off, so that you can log back in later and pick up where you left off. Something like a daemon is basically meant to run in the background and never be directly interacted with. It's a different thing to tell a process "hold on; I'll be back later". As an example: I've got some SBCs that are on all the time. It's useful to be able to pop on, pick up where I left off from, do some experiments, then log out, without having to set my environment back up every time I do it. There isn't really a better way to achieve the same goal.