It’s ironic, though, that what we love about playlists like Lofi Girl (endless streams of music that feel fresh yet familiar) is exactly what’s being exploited
In this particular context, it's for passive entertainment; things like blockbuster movies are intended for actively watching.
But that said, people massively underestimate the background entertainment market. Spotify Reddit is that for me a lot of the time, as is youtube. Netflix and co less so, if I'm watching something I want to enjoy it, not have it as background / comofort stuff.