By my understanding, demosaicing almost always just "blurs" the photo slightly, reducing high-frequency information. Tone mapping is unavoidable, invisible to most people, and usually doesn't change the semantic information within an image (the famous counterexample is of course The Dress). Phone cameras in recent years do additional processing to saturate, sharpen, HDR, etc., and I find those distasteful and will happily argue against them. But AI upscaling/enhancement is a step further, and to me feels like a very big step further. It's the first time that an automatic processing step has a very high risk of introducing new (and often incorrect) semantic information that is not available in the original image, the classic example being the samsung moon.