If the corners are irrelevant why bother to fill them?
I have no issues with the digital equivalent of the sophisticated darkroom techniques I have used for 60 years, all of ACR's non-generative single image tonal controls are just fine. I did large format (mostly 8"x20") for a long time so with small cameras pano stitching an important tool, at least until a vendor comes out with a 8x20 aspect ratio sensor... Neutral density single strength and graduated have been central to the color game for ages so they are fine too, correcting in camera at exposure time is way preferable to hdr.
These techniques are used to bring the image to express what I felt and experienced when I took the exposure. No generative ai can create that.