Cheap gun or not, it's still a Ruger and it still has a warranty. If the barrel isn't clocked correctly, Ruger needs to fix that or replace it. If it is properly assembled and you just want a drift adjustable front sight, that's a different situation.
I agree. If there is some measurable error in the gun, i.e an overly wide cylinder/barrel gap or a bad crown for example, then I would definitely send it back.
It would be easy enough to see if the front sight is lined up straight with the frame, just lay a straightedge along the side of the frame top strap and measure the distance from it to the sight. Do that on both sides and compare measurements. (This assumes the cylinder lines up straight within the frame, but the frame is probably what the factory used to align it for the minimal machining it undergoes so I think it's a safe bet.)
What if it's lined up straight and the problem is how the user grips the gun and what brand of ammunition is used, what then? I don't see Ruger dealing with that. I have seen three good shooters use the same handgun and ammo and shoot to three distinctly different points of impact. That's why they invented - gasp - adjustable sights!
If the gun shoots small enough groups to be acceptable then I would most definitely settle on a brand of ammo it likes and then figure out the best way to make it shoot where I look. And yes, that would probably involve powered machinery. I know my own skill level with a file.