When you crop an image you are cutting off image content. That is what cropping does. If you use Content Aware scale to change your 3:2 Aspect Ratio camera's image to an Image with a square 1:1 Aspect Ratio most of your scaled images contents will not be acceptable to you. There will be too much unacceptable distortion.  If you use Content Aware Scale interactivity and do some masking for Content Aware Scale you may be able to get acceptable results for some images. You should not expect to be able to rescale a landscape or portrait  close up of a person head resized to a 1:1 aspect ration and see an acceptable human head.