He is only good at healing. That means loli-chan will be cut, bruised, become a paraplegic multiple times in a day etcetera. She'll be a teammate in Kenshi. He won't be The Medic.
Why couldn't he just set-up a private practice inside the labrynth? Why couldn't he level-up himself using his financial resources to minimally sustain himself while he constantly casts auto-heal while getting mauled to death by murderhobo bunny rabbits? Why couldn't he join a clan of thieves and heal locks and doors and traps and alarms out of existence?