Ditto, for me valid, not agony. And if nothing else, on a purely practical level, I don't personally like a hodge podge of shapes and resolutions, especially in a large body of work, in one show.
I don't know how my friends arrive at the aspect ratios they like, but I see a lot of them sticking to one format for a large body of work. But of course ideas about "frame" change. I admit freely to being a victim of the horizontal western preference, and to this day painters like John Singer Sargent sometimes throw me off.
https://upload.wikimedia.org/wikipe..._Singer_Sargent,_1884_(unfree_frame_crop).jpg
Like a couple of my artist friends, for many years, I made slides which obviously cannot be cropped, so I got used to a frame that never varied. Even when I made videos, I never used the "Ken Burns effect."
I have never seen a show of work by anyone on this thread -- so I really don't understand their concept of "arguments," "rules," fox holes," or "quali-religious."
I have never heard this kind of discussion among those I know, I think most of my friends just do what they want (and maybe a bit what their dealers want).