
It means he won’t be able to receive any healing powers. Even if he is on the verge of death, no one can heal him. Seo Chaeyoon saw this as his way of honoring and compensating the comrades who gave their lives to heal him back in the Great Dungeon Era. On top of that, people blamed him for suddenly disappearing, saying he was neglecting his duty as a hunter who was supposed to help save the world. But what they didn’t realize was that one of the biggest reasons he stopped fighting, besides wills, was exactly because of this healing resistance. And when the truth finally came out, those same people felt guilty for being so harsh without even trying to understand what he was going through.

Supposedly everyone can be healed but he reached a threshold no one knew about because they healed just him for so long.
They needed too because he shields and others stuff but mostly that. He is now unable to be healed but he is relieved because he has had to watch people die around him while they all focused on healing him to finish the mission.
can someone please explain the healing resistance thing? im not quite getting it like why is there blame