I completely agree. And I may have used the wrong term, because everyone is asking me why crop at all? I don't know how much more clear I can be, but when I scan negatives, there is a black frame surrounding the exposure, you know, where the exposed section ends. I am simply getting rid of that with a preset ratio. I think everyone does this, not sure if that qualifies as cropping, but my goal is to maintain all of the negative when possible.
Just use the crop tool in PS then. Not automatic but takes about 5 seconds.