Saving people was never really his priority. As a man from the 20th century, he was used to safety and people having much better living conditions than ever before. However, here, it's different. There's no social media to report if someone goes missing, and no medical welfare that modern knowledge offers. So he never really had to care about it. If they're fated to die, they will die.
However, In this world, he had to think about saving people. Because he has to actively choose to do it.
The same kind of mystic force attracts a similar mystic, just like he was with happiness. This meant he had a way of drawing the monster right to him. The mystic slate in his pocket could be infused to exert its mystic properties. He was certain it would draw the monster's attention.
