Frankly, I've been in oral exams, in Romania they're (were?) part of a national exam at the end of highscool. You just have to practice.
If hundreds of thousands of highschoolers in a rather poor country could figure out how to do it (any generally not flunk due to the oral part), for sure university students can do it.
Anyone not able to do it will not really be able to pass any interview, persuade peers that their idea is good, etc.
> Anyone not able to do it will not really be able to pass any interview, persuade peers that their idea is good, etc.
I strongly disagree there. Orals are a situation of complete knowledge and power imbalance between two parties. That is not the case when it comes to persuasion.
As for interviews - yeah, they are similar, and that's why interviews also are seen as very problematic. A lot of people who can be perfectly productive in day-to-day situations, simply don't do well in interviews. We should be striving to correct that, not accept it as inevitable.
It's like LeBron James saying "I learned to dunk, so anybody can dunk!" - but basketball is not just about dunking, and not everyone is LeBron.