[Graybeard58]

The obvious problem with that position is conceivably, that other, more advanced otherworldly civilizations might be so cosmically distant that they cannot communicate with us-- yet.

Perhaps, the "letter is in the mail" and just hasn't reached us yet. We've been sending such "letters", at least since the invention of radio.

[truth_seeker]

“Perhaps, the “letter is in the mail” and just hasn’t reached us yet. We’ve been sending such “letters”, at least since the invention of radio.”

“Since the invention of radio” is a mere tick of a second, on the grandfather clock of time.

[PIF]

And perhaps no one uses radio except us, since radio and the entire EM spectum is but one small subset of possibliities - cf: James Clerk Maxwell.