But without this, all you have is a blurry image, in which you cannot accurately make out the details. You may wait until you get a better image due to different atmospheric conditions, to determine what they actually were. With this, you may get something hallucinated which looks very unexpected. Or in military contexts, maybe looks like a threat.
Someone with a little training and practice can get lots of information out of these kind of "blurry" images. You can make educated guesses based on understanding of the real world.
Imagine you are looking for swimming pools to find water to fight a wild fire. All you have is a "blurry" image. That blue shape on the image could be a weirdly shaped tent or patio. And that would be very obvious on high resolution drone imagery. But 99% of the time it will be a pool and that is good enough.
All data has limitations and this is no different.
