Challenge accepted. How will they know?
Of course when you upload at no one wants you to do the full resolution image; at 1024x1024 you might be able to fool people with something ML made.
I believe most of these models only use 1k images so they really can't make anything bigger yet. Maybe someday but not today.
This is the sort of thing that changes incredibly quickly. I'd guess that a big chunk of the source data will be in 8K within a year or two.
Which is to say, it sounds like the solution is dedicated GPUs that focus on VRAM over speed.