I've always thought the numerous cases of little characters in white suits gathering soil samples and the use of medieval medical experiments as reported by abductees to be pure misdirection. Certainly any space fairing civilization could use technology invisible to us to find out whatever they want. There's no need to mutilate cattle, collect bio samples in silver jars, procure our sperm with suction pumps, anal probe us or any of that jazz. It's all quite ridiculous.
That being said, what's the point of all this theatre? There certainly seems to be a concerted effort to make us feel like we are someone else's property (Fort). Still, cases like Pascagoula and Cisco Grove really make you scratch your head and wonder what the heckin' is going on here?!
I think we are left with two specific considerations:
Maybe the Fermi paradox is wrong and life is not that entirely abundant in the universe and, as Christopher O'Brien often mused, perhaps earth is a rare piece of biological abundance that makes studying us quite desirable, hence the various versions of E.T. that are seen visiting us in spaceships. Could be interdimensional or folding space time - whatever, and maybe their crude collecting skills is just about expedience and leaving things up to robots to complete their tasks. Nanobots makes more sense to me but whatever....that's the way it looks doesn't it?
The other consideration, also an oft repeated O'Brien musing, this phenomenon is very earth bound and is something that exists parallel to our own reality - that's why we call it paranormal.
This then leads to the next set of divergent paths: Vallee vs. Clark vs. Keel etc....Keel was a demonologist and there's a lot of folk who buy into that, and Vallee's control system leads to Pasulka's notion of an agent steering the culture of humanity through its control system, and then there's Clark who says there's no proof of any of that and all we have are cases with evidence that is very suggestive of 'aliens' and we have experience anomalies that are neither part of the concrete world nor the imaginary but lies somewhere in-between - a both/and situation that we simply don't have the language to understand.
Weird stuff happens all the time. We may be just categorizing it into our own mythology across time that we call god, airships, flying saucers, ET, monsters etc. when in fact it's something simply outside our biological capacity to perceive properly let alone understand.
Some say we need to learn to ask better questions and stop trying to put the round UFO peg into the square hole of humanity. I doubt we even have that capacity.
Meanwhile, I'll just keep listening to Bigfoot witness stories....