Not really, it was explained in that story that a soul is the vehicle through which people can feel emotions. If you have no soul, you can't feel anything at all, absolutely nothing but an oppressing, mind-numbing, sanity-destroying nothingness.
This Stalker guy spent centuries soulless, and when he finally acquired a soul and the first things he felt were terrible guilt and sadness (because he had acquired said soul at the cost of betraying a person who had been kind to him), he was so happy he cried tears of joy, because even the worst emotions are better than the black hole of feelings he had been stuck in.
As a concept, I rather like it. I just wish it had been explored more in detail.