Factorio rewards the players progression through the game by taking away points of pain. The helper bots being a key transition. Without that pain there would be no reward. The fact that refactoring is expensive in time and complexity is what makes it realistic - it makes the earlier decisions important and consequential.
You can always enter creative mode and make whatever changes you want in the game instantly, but in my experience that does make it less fun.
You can always enter creative mode and make whatever changes you want in the game instantly, but in my experience that does make it less fun.