So conceiably someone could have sent a signal from the other part of the lense some billion years ago and we "just" need to figure out what to listen for.
The issue is that the original comment is just a baseless assertion that Boeing is having issues due to identity politics, and not anything of substance. Not liking those sort of unsubstantiated politically motivated claims is not "political correctness".
Maybe well-known, but: Ctrl-C exits interactive mode and goes back to normal mode. Easier to reach than Esc and I usually find rebinding/aliasing keys to be too much of a hassle
Throwing out grave insults because someone on the internet doesn't like your idea is a pretty good tell of the sort of character he is, even if it was 4 years ago.
Adding to the list of reasons to dislike him, there's him trying to get a lawyer who interviewed him for the SEC fired from his new unrelated job.