@Poyo-chan solo leveling is a different matter though because it happens in real life while this one is just about to happen because of a game interference in real life and ofc portals are needed if one needs to cross dimension isn't also having portals isn't that bad tho since this one is a more profound arch though he doesn't summon anything he can still beat players with diff capabilities and powers, so to be more specific the game is just about to happen in real life so portal is a necessary
