Su Xiao's witch-hunting has three purposes. First, to raise his Witch Hunter level – once he reaches Red level (Level 3, top level), he'll be able to access classified intel and look for clues related to "Mo." Second, to obtain Source of Exploration + Treasure chests. Third, to gain Holy Healing Church Reputation. Once he becomes a Black level (Level 2) Hunter, he'll be able to exchange items at the Holy Healing Church's Camp Shop, which will be a major profit.
Three birds with one stone, why not? Besides, Su Xiao will be staying a long time on Dark Raven Continent. If he doesn't thoroughly prepare early-stage intel, it's almost impossible to learn about the Blade Demon Sealing Device.
Riding in a carriage on the road is very bumpy, and the speed isn't that fast, but Su Xiao will be going through high-intensity combat for quite a while after this, so he must have plenty of time to rest.
