What about the Dyson Dilemma made you doubt such? I'm not sure I understand.

The fact that we can look up at the night sky and see all the stars at the brightnesses we expect them to be. They can be used for so many different things that I can't see a logical reason why every civilization would just ignore this technology.

Lets say an alien civilization has mastered fusion. That is pretty rational, but even then those aliens will require hydrogen, helium, or a couple other types of atoms to power that fusion. We could mine the moon and planets, but by star lifting we could get many thousands of times more.

Now lets say that civilization has mastered the act of creating energy from nothing. That puts a damper on things, but not completly. They still have to have space to live, and a few dyson rings around one star can provide more space then thousands of solar systems worth of planets combined.

So now lets say the alien species that are masters of perpetual energy, and also happy to only colonize their home world and maybe a few other planets. Well you would think they are atleast interested in preserving their homes for as long as possible, and to push back the enevitability of their sun exploding or going red giant. Starlifting will also allow you to extend the life of the star.

These things should be everywhere, but unfortunately we don't see them anywhere. Remember there is nothing high tech about what I am discussing. The only limiting factor is how long you have to do it, and the universe has had plenty of time.

The image you posted is a pretty compelling one in my opinion! Though there's artwork from all around the world from pretty much all cultures, so to me it seems pretty overwhelming.. Almost all ancient cultures reported interactions with beings from the sky and quite a few even directly credit them with building their megalithic buildings.

I found it to be so as well, and like you said this is just one of many examples. But honestly its not that weird that an ancient civilization might look at comets and think "vehicle of the gods". Almost all civilizations have also reported visitings by ghosts and other creepy things.

There is also little overlap with these creatures other then being from the sky and bringing gifts or knowledge, or firey hell. And those all seem like they would be common traits when envisioning a species that is greater then human.

It is interesting that you mention how it's common to hallucinate and that we do it every night when we dream and I think there may be a connection there, some researchers believe that aliens are less physical and more from another dimension and that would make a decent amount of sense, though I think there's physical ones as well and when I say "mass hallucination" it's like, multiple people seeing beings at the same time, like a "shared experience" and such similar reports separated by so many years and geographical distance.. Just seems like it's more than just something in peoples heads.

Mass sightings are weird, but they are almost entirely UFO sightings which could have a number of natural causes. It should also be considered that unless there is multiple sources for a mass sighting there's a pretty reasonable chance that it wasn't a mass sighting at all.

That's an interesting possibility I've been considering more and more especially recently after watching videos on YouTube about the Holographic Universe theory and "shadow people" which I had an experience with when younger.. Perhaps there is some kind of.. Mental thing going on where we have access inside our own minds to not only things a long distance away, but.. "everything".. And some of these experiences may be sort of a "bleedover" or a "glitch" or something like that.. Hmm..

The youtube channel I posted in sources has an episode that I think is pretty interesting about a concept known as the boltzmann brain. Which works on the concept that given an infinite amount of time anything that can happen will happen. For example perfect recreations of you complete will all your memories.

This means that it could be possible for a brain to appear for no other reason then random particles smashing together over time. If such a thing is possible, then it is possible to happen multiple times over. One of which may decide to escape the lonliness of being a consciousness in a sea of nothing by falling to sleep and dreaming up a world of its own.

Complete with its own civilization(s). This leaves the interesting question of "what is it the people and matter in your dreams are made of". The most logical answer I can think of is they are made up of consciousness.

Yet in the end I admit I don't know..

That is the crux of it, in the end there is nothing that we can truly know beyond a shadow of a doubt. Even the Dyson delima assumes that the laws of physics works reasonably close to hiw we assume. If we can ever travel to alternate demensions it can put a hole in the idea since there could be infinite supplies of energy and space if we could just hop over to a new demension.