Once within the Magus World, Dante descended into his virtual body anyway. He could have come here without using it, which was something he did plan to do, but he wanted to head to the library and learn suitable 2nd Rank Space spells.
Wait, his AI created hundreds of spells and techniques, right? Why doesn't he use any of them? Why bother with what the Celestial Arcanists have?
This had nothing to do with logic, just preference. It was half 'don't get high on your own supply' and half 'I want to learn spells the normal way, damn it'.
Acquiring power was fun, not just because of having the power, but also the process of accumulating the power. Dante was just adding a hint of spice to his magus power growth.
