You have to look through a scope with your eye at the correct distance from the lens.

A camera is not an eye, so any claimed aberration in a scope lens on a camera is null and void, in my opinion.

I would think the lens looking through a lens doubles up the affect, like polaroid glass's held over polaroid glass's.

The only optical sight that will not do this is a reflex-type sight, as there is only one lens.  The picture in the lens and the one around the lens should be the same and aligned.

With the number of lenses in the scope, and the ability to move some of them in order to adjust zero and change magnification, the image seen through the scope can never be exactly as flat and aligned with the image seen around the scope.
Not an issue if you are actually aiming through it.  Your aiming eye sees the slightly distorted image and your other eye sees the actual image.  It will be hard to tell any difference at actual 1x magnification.

With slightly more magnification, up to around 2,5x, you can still aim with both eyes open and place shots properly.  Your brain does the math without much complaints.  Try it and see.  With a little practice, you get it right quickly.