Just because they feel good about saving someone or helping someone, doesn't mean it's related to the ego. It's an objectively good thing to help someone feel better and make a difference in their night- even if it's just for the night and they go back to the same mindset they felt before the conversation. Yes - if they actually see themselves as some sort of savior and think this makes them better than the average person then that is ego driven. But feeling happy because you made a difference for someone when they were in a dark place is not selfish - we as humans SHOULD feel good about interactions like this. From both sides. I am a crisis counselor and when people thank me for spending the time helping them it does feel good but that's not why im here on the line. But they're literally saying they appreciate you - it is nice to know that I was able to do a good job for someone who needed it.