It is very hard for most to brake out of the egotistical ideation that such a collection of beautiful gases bodies of physical energy known to us as hydrogen were created souly for our viewing pleasure. Those bodies serve the purpose the same as out own to sustain the temporary magnetic state we call life. There mere fact that there is isobvious physical representations of other cultures absent the written data should alarm anyone. Hell we can't think past 6000 years... Evidence of foul play at best by a more advanced being than we are. Space travel is just a common as our automobile travel to most in this uni verse. The uni verse ain't spooky... Hetep
You have met Visitors?
Maybe these Others are traveling _between_ Multiverses instead of from point A to Point B in one universe as NASA does. Until mortals can travel FTL, their physical bodies will not live long enough to reach distant galaxies.
As to if the Visitors are up to foul play, I can't imagine how they could be more devilish than we:
My intuition is that forms of life/Light more advanced than we are so because they have had tens of millenia more years than we to get over themselves and recognize the self-defeating consequences of me, me, me.
Which is to say that the reason Earth is so many light years away from other life forms is that this was designed into the mix from the Zep Tepi to give us more than enough time to mature into Good Neighbors, or self-destruct.
I see these Visitors not as the evil reptilians of David Icke's vision, nor as the deeply engaged benevolent benefactors of the Brotherhood of the White Temple's vision, but rather as careful observers who do gently nudge us towards the Right Path from time to time but, other that, they are waiting to see whether we choose to ascend to godliness or descend into a bottomless pit of our own making.
6000 years ago, maybe much earlier than that, they were nice enough to give us enough tools to have a fighting chance to save ourselves. This is the Mystery of the Great Pyramid, the Great Sphinx, the lesser pyramids in many other locations, and even Europe's StoneHenge. These are all keys to the puzzle of Life --- if we would just stop hating and killing each other long enough to pay attention to the Signs.
They observe because, for the sake of the rest of creation, we devilish terrestrials
will not be allowed to infect the rest of the universe with our sickness.
For now, they keep a low profile by usually only appearing to semiliterate trailer park dwellers or weird out of the box thinkers like myself who few other mortals are going to take seriously anyway.