Although his swordsmanship talent is quite good, his body is too deficient. Even with Spirit Energy to compensate, he still needs to train diligently to achieve a personal breakthrough.
In fact, the idea of not relying on Demonic Beast Materials for self-enhancement was not Ian's original intention.
The reason for doing so is because the territory is poor (relative to the goal), unable to afford the Magical Medicine Ingredients for over sixty people, so he can only train in this way to see the results.
After all, in the eyes of a true genius like Ian, the power of magical beasts and the power of humans are both just power, fundamentally no different, as long as he can handle all of it skillfully in his hands, there is essentially no difference.