People will believe anything as long as it comes out of the mouth of an 'expert'.
This projects the conspiracy theorist's own use of specific idols they pass as experts. But the scientific consensus is not a scientist's opinion, so this is also a straw man.
False Memories? Gimme a break!
The most parsimonious explanations are inconvenient if what you want is to jump to the least likely, most outlandish, hasty conclusions.
Overactive imagination maybe, A spiritual encounter I would buy, but false memories? Nah...
These are still delusions, like false memories. Add to that sleep paralysis, lucid dreams, hallucinations, delirium, personal experiences shaped by false beliefs and fears.
And this does not address anything of the deceptive paranoid political disinformation conspiracy theories associated with UFO crackpottery.
Or the fact that while the universe is old and big enough for other life to be likely in it, it is still extremely unlikely for two to develop intelligence and technology, successfully explore space and potentially meet. We're speaking of many light years apart and with the incredible limits of propulsion systems. The anthropic principle. This is also why, since it's human folklore, believers tend to integrate it with their religion and it's a modern equivalent of spirits and demons. Add pseudoscientific woo to pretend that they're interdimensional, because imaginary beings can't be grasped by instruments and they must be claimed to travel faster than light.
But we can't expect much reality based critical thinking from RR-BB.