Earlier quoted context omitted.
What would those logical inferences be ? I’m not sure i got your point right
Given the enormity of the universe and the seeming[0] impossibility of FTL travel, plus the complete absence of astronomical observation of extraterrestrial civilization, and the incredibly tiny (on astronomical scales) window of time in which we have data, any other explanation for pretty much any phenomena we care to observe will be more likely than "aliens did it". [0] extremely well supported
-Deep sea exploration
-DNA sequencing and cloning
-Flight
-Long-range electric power
-Microbes
-Organ transplants
-Solar panels
I understand the enormity of the proposition of things such as FTL travel. But just saying "it doesn't have a fit within our current framework of understanding, so it's impossible and a moot point" seems a little...conceited, given all the historical precedents of exactly the opposite becoming true, eventually, given enough public interest.