the way it works is that the not-blurry data is not interesting
the blurry data is only interesting because you can't yet see that it's not interesting
100% agree. Let me try to phrase it differently, see if that helps with understanding of the point...
Pedantry ensues:
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Anything detected by a camera is either:
1) going to be resolved to the point that you can see clearly what it is, or
2) it is not going to be resolved clearly enough to see what it is. (Edit to quickly add -- thoss that can be identified are either never reported as UFOs, or are debunked and should -- but too often are not -- removed from the set of evidence concerning UFOs!)
This will always be true, and always has been true. This is a function of the quality of the camera, the size/distance of the thing being imaged, and stuff like how hazy the air is, is the lens clean, etc..
Better cameras will be able to resolve things that are smaller and/or further away.
During the decades that interest in UFOs has been a thing, cameras and imaging systems have improved.
Improved cameras have not led to acquiring sharp, high quality UFO pictures, that is, those that can be resolved clearly enough to see what they are while also remaining mysterious UFOs. A with the other cameras that are not as good, better cameras produce UFO pictures that show things that are too far away and/or too small to be resolved.
Over time, how far away an object of a given size can be resolved has increased. This has not led to good clear UFO pictures being produced. When an object of the size and distance that used to be UFOs are resolved by better cameras, and all that is seen are planes, birds, balloons, etc. No "real" UFOs. The only UFOs are out in what we call here the "LIZ" -- the Low Information Zone, where objects are too far away for their size to be imaged clearly. They can be detected, we can see a blur or a blob, but nothing is seen clearly.
This has been the case over 75 years.
No camera will ever be able to resolve everything in front of it, no matter how small and far away. There must always be things just too far away to be resolved -- things that can be detected as blobs, points a few pixels across, etc.
But UFOs remain out in this Low Information Zone. If UFOs are a real, new and distinct phenomenon, thay would, for example, have to know it was safe to fly in close enough to Cmdr. Fravor's plane to be clearly seen, knowing he was not capturing images, but then know exactly how far away to get from Underwood's plane so that an indistinct video of a blurred blob could be captured. And they have judged this exactly right, every time, for decades.
This seems extremely unlikely if UFOs are a real new. unique phenomenon. They would have to unerringly always remain just too far from every camera that might take an image for the image to be clear and sharply resolved. Every time, no mistakes, for decades, all over the world.
Or, there is no phenomenon out on the world of "UFOs," they are the inevitable result of the limitations of every camera that will ever exist, with mundane items sometimes being too far away to image sharply and similar inability to to correctly identify other mundane phenomena, and some number of hoaxes and tall tales.
(Hoaxes are a separate subject, and in my view account for every reasonably clear structured UFO image I have encountered in too many years wandering around this ol' world and being interested in such things has been a likely hoax, either by the person taking the picture or with the person taking the picture being hoaxed. Discussions of such images have happened in their own threads, any images that somebody wants to discuss that do not already have a thread can have a thread started. A discussion specifically of how one decides a given image is a likely hoax should, I think, have it's own thread.)
End pedantry! ^_^