> it's not "for the sake of talking", it's for the sake of socializing, meeting new people, building connections, which is the whole point when we're talking about flirting or lack thereof.

In my experience you really have to be constantly spitting nonsense to keep the conversation from ending and to avoid awkward silence. When the other person is talking, even if I didn't hear most of what they said, I keep nodding, because I don't actually care in the slightest about what they were talking about, and so asking to repeat does not make sense, as that would only increase awkwardness. This is why I said "for the sake of talking." The only thing that matters is that you are talking, not the content of the talk.