well if it isn't theft, it shouldn't be called theft, its really that simple

.. it's not theft, its not "stealing", its not robbery, its PIRACY .. just call it piracy

.. and I guess the point about loot boxes depend on where in the world you live, some places call it gambling and is - or are in the process of - regulating loot boxes as such .. most likely not the case for all counties, but in some, they ARE gambling
I do agree that there isn't anything "right" about pirating stuff .. but I totally understand why people choose to do it