I like that theory. But it may not be enough for ET to know the outcome of our DNA research. Let's imagine that in the future the existence of a killer gene is discovered and researchers need DNA samples from famous killers of the past... But they can only access ink prints of fingerprints from police files. Then they would have to dig into some graves to get real genetic material.
A communication system that can tap into the internet and download everything must necessarily be a two-way communication system... it can't just read, it will have to press "enter" from time to time and answer the CAPTCHA. So the possibility exists that some of the weirdos online would be aliens. Some of the weirdos advocating for this or that are aliens. Some of the weirdos online who bought bitcoin early and are playing the stocks and who have amassed large fortunes and who are savvy at not just making more money but also at spending that money on politicians and scientists and influencers to get their way are aliens. So if they need some body dug up... they could get it done.
Looking at some of the weirdos inhabiting TikTok, I can easily believe that they are aliens, or are CGI constructs made and controlled by aliens. In which case it's clear that at least some of the aliens online do *not* wish us well. Whether that means they are actively belligerent or are simply amused by chaos... dunno.
Our Galaxy is old enough to house civilizations that may be BILLIONS of years older than Earth and that have evolved to develop telepathic capabilities. If so and if they are communicating with other civilizations by this means, we will not be able to grasp their thoughts and we will continue to ignore their existence.
Chronologically speaking it is not very probable that two civilizations evolve at the same time and are ready for contact. A few thousand years are not much for a galaxy and a too long period for the UN, NATO, or the Third Reich.
There is the theory of cyclical history as proposed by Oswald Spengler and developed in fiction by A.E. van Vogt, Robert A. Heinlein, and Isaac Asimov. According to that theory, a civilization can be ‘young’ and even barbaric, and yet high-tech, since civilizations comes and goes, though most of the technological progress done by the previous civilizations are not forgotten.
Perhaps biological intelligence is just a transient phenomenon in evolution. A very advanced society can achieve immortality by transferring the personality and memory of its individuals to eternally self-repairable quantum devices, as time crystals or spheres of energy. In that case they would prefer to inhabit the cold outer regions of the Galaxy and even intergalactic space, away from stellar disturbances, supernovae, and gravitational waves, which could cause interference in their computer systems.
They may despise societies made up of biological organisms and avoid any contact, as we do with mites. Why would those higher entities bother to establish a communication with us? What could we tell them?
Extraterrestrial creatures may have visited our world in the past, conducting a mapping study and collecting DNA samples for some galactic database. Perhaps they left robot probes behind to monitor our evolution and may come back if they do not like the latest reports.
There is the widespread belief that such an extraterrestrial technologically advanced civilization should not be aggressive, but even so they can do us a lot of harm. It would be unbearable for us to feel we are treated with the same patronizing attitude we deploy towards dolphins and chimpanzees. Just that feeling could destroy our societies, and their opinions on racism, democracy, religion, or monarchy might encourage sympathizers and imitators to end the system.
But they might not be so benevolent and not consider reprehensible the collection of biological samples, including us, or maybe they do not like what they find here and decide to exterminate us as we instinctively do with insects (many legs and hairy appearance) without considering whether it is a dangerous species or not.
They may even simply consider us proteins (the intelligence of cephalopods, cetaceans and primates is not at odds with cannibalism) or have an imperial pulse, the first man-made object to leave the Earth's atmosphere was launched from the Third Reich.
But the only sure thing is that, to get to us, ET will have to use FTL technology and the fact of knowing that it is possible would also cause chaos among the scientific establishment. That might be a good reason to not officially announce their existence and just study us as we do with abyssal wildlife.
Bathyscape=UFO?
Perhaps the inventors of the Internet received some ET inspiration, which would made extraordinarily easy to snoop into our lives as we do when installing cameras in bear and beaver shelters to study their family life. Although it would be much more effective to give them a mobile phone.