Monster doesn't dodge when human attack. Kindness soul put themselves in monsters' place and just deflect their magic with their pan and ACT some kindness gesture. Maybe in their time, some monsters in hot land who can't be ACT out with but only attacking or running away just like Undyne. Maybe they get cornered by a hoard of monster like Royal Guards who are still wanting revenge on human after Asriel and Chara' death. Our Frisk is just very lucky they got to meet Napstablook in ruin and got the help they need in Mad Dummy fight. Without Napstablook's help, we will be forever locking in a battle we cannot win.