Beginner's question: opinion on cropping

graphikal wrote:

... as there is in framing in-camera. They both involve choosing what to include in the image, and what to exclude. They are in fact pretty much identical exercises of photographic vision, except that in postprocessing one has of course already previously excluded many potential parts of the image from consideration; in that sense cropping is finishing a two-stage framing process.

In many cases, cropping involves MORE art than is possible when framing in-camera. For example, when shooting birds in flight. To think otherwise is to declare that art is constrained by the placement of AF sensors, which is quite obviously false.