Why not make the world move to you faster instead of having to move through it faster?
This is actually a very good question, but not in the way you intended.
If you as a game designer, hilariously, decided to design your RPG such that everything in it moves at twice the speed one would expect, including the player, wouldn't that, in effect, provide what rusty apparently desires, that of not wasting any time reaching your next destination?
"But wait! All the NPCs and monsters are moving twice as fast as they should, that's not fair!"
Well, since you don't really care about "realism" or "immersion" at all, then too bad. Aren't you just wasting your time fighting and interacting with them at "normal" speed anyway? Just like "walking" wastes time? That's why we sped
everything up! Brilliant!