Is it cruel to extinguish a person who self-immolates? If they live they will have tremendous pain and suffering. - sh.itjust.works

I read that the police were extinguishing the guy who set himself on fire yesterday only two minutes after it began. Obviously, the guy did not want to live. Putting out the fire so quickly does not ease his suffering and would only increase it if he were to live. As long as nothing else is at risk of catching fire perhaps it would be best to stay away. What do you think?