The MC keeps his fool title well stuck to his head, selling a magic research he conducted for centuries for literal scraps (compared to its true worth), all to "save" 2 loli he doesn't know from a job a thousand girls done before them and another thousand will do after, he can't save all possible prostitutes, only this 2, the author even made clear that removing the red district would create more problems than it solves, his buddy and the high class ho just told him a sob story counting on him being a goody two-shoes and resolving the problem for them with money, because using magic to kidnap the 2 would probably put their future at risk.
it wold be a better solution to kidnap the 2 girls or try to make restructure the system.
The girls weren't even sold to pedos, they are in training until their body is ready, and if they were free outside the bordel their life would actually be worse and more at risk, they would keep their prde maybe, when dying of hunger, or endgetting kidnapped by bandits.
This arc is just to make clear how stupid the MC is and probably make so the teleport magic get spread quickly, and possibly stolen by bad guys, that will create a whole new problem various magnitudes above 2 loli having a secure job in the future.