I can imagine such topics, but nearly none of them occur in a software development workplace. As I said before, it has been my experience that the extra bandwidth of a voice channel is nearly always wasted. IMO the best case for voice calls as a developer is brief daily status/standup meetings, and you've probably seen how many people around here dislike those.

I think what's really going on is that people who grew up analog don't see textual decisionmaking as "real", and need a familiar voice call to make things feel "official".