Messing with people's souls was extremely dangerous.
The slightest mistake could easily cause them to suffer permanent personality disorders.
More serious damage could easily cause people to forget their original selves and turn into completely different people!
Ves had experimented on the spiritualities of enough test subjects to understand that he could never take this lightly.
The main reason why he dared to cut into people's spirits and bestow them with companion spirits was because his operations were relatively shallow.
Ves did not possess any further insights or understanding in the nature of the spirituality of a human being.
If he wanted to make any further progress into this highly mystical and esoteric field, then Ves would have to conduct a lot more dangerous experiments!
His most conservative estimate was that he needed to experiment on tens of thousands of individuals.