Path of Exile is online only as well. Diablo 3 however many years ago was online only too. This genre has been this way for a LONG time now. I understand people would like an offline mode but that fight should have happened 12 years ago if they really cared.
I disagree, the genre has not been this way for a long time. You named two games and one was Blizzards test for online only. Should I counter those examples with Grim Dawn, Torchlight 2, Diablo 2 Resurrected, Van Helsing, and Titan Quest?