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People will often say "how can UFOs/cryptids/ghosts possibly exist when we have high-quality cameras in our pockets and 24/7 surveillance? Why don't we have clear footage of them?" But this is a fundamentally flawed line of logic.
1st of all: getting photos/videos of far away objects with even the most modern smartphones is much, much harder than you might think. Without sophisticated equipment, the naked eye will almost always be better at sighting faraway, quick-moving, or hard-to-see objects.
2nd: telescopes. Telescopes are not merely wide-angle cameras that point at the sky and record everything visible. They have to filter out noise and focus specific parts of the sky, wavelengths, etc., or the information would be unusable.
3rd: surveillance cameras. Not only are surveillance cameras restricted to (relatively) small urban areas, (and even then are often restricted to only a portion of those urban areas), but they are also fairly low-quality, so the same argument as smartphones applies.
4th: so, let's say that you actually did capture something on camera. Maybe it's even pretty high-quality and demonstrates something truly extraordinary. The question is, will anyone actually see it? And if they do, will they actually save it or show anyone?
Most surveillance cameras are not monitored 24/7. And the footage will likely be discarded after a certain amount of time. If no one notices it, or decides to save it, then it may as well have not existed.
All of this really just boils down to what I think is a fundamentally false belief that we have about the world, which is that somehow we have this ubiquitous and total knowledge of the world as it is. There's so much that we not only can't control, but can't even see.
