Earlier quoted context omitted.
I understand your perspective. Unfortunately, however idealistic, I don't see that being a great benefit in the long term for anyone. I prefer environments that teach you how to advocate for your ideas. Build you up as a good self-advocate. Environments that say "Hey everybody! It's Timmy's turn to speak. Pass him the talking stick" are patronizing and disgust me at the onset. Better to have someone by your side sayi…
I think you're actually missing his point, which is not so much a matter of perspective but rather a direct application of Goodheart's Law. When you are trying to incentivize by proxy (e.g. promote good ideas by rewarding vocal and assertive people), you better hope that there is a very tight correlation between the two. His point is that there isn't much correlation between good ideas and assertive personalities, so…
A man of culture!
I think we can call in the Pareto Principle here. After a certain point, assertiveness / aggressiveness becomes zero-sum (or worse). But getting to the point where everyone worth listening to has had a chance to speak gives you a lot of bang for your buck. You can either have an environment which enables this (everyone gets the talking stick) or train everyone to have a baseline of assertiveness skills.
The baseline shouldn't just be "excuse me, I have a question" scenarios though. The baseline has to be sufficient to handle stuff like "I think my boss is screwing up big time".