Dungeon and monster isnt necessary in guideverse. They can use their power for natural disaster, accident, war, any crime. People with power can live a normal life. Eventually there will be villain with power and they can use their power for that too
Just like omegaverse, guideverse system is different in different hands (re: authors). This story is leaning to soulmate type of connection, hence the mark on their backs
While esper is also admired here, the guide and esper actually struggled more because of the matching thing. Which makes it look like being guide and esper isnt all beneficial, theres more of disadvantage in the system than just esper needing guide energy. For me that gives more flavour to guideverse
The Espers exist for no reason. There are no monsters. No gates. No dungeons. Nothing. The Espers barely show or use their powers. The guides also exist for no reason. They dont have powers either.
Their guiding ability doesnt exist. They're just regular people and the espers feel better around them because... ? The guides dont have any type of guiding technique. They dont have any ability to use their guiding powers.
Everyone is just walking around being 1% magical. Might as well have just written a regular non magic story.