Not all personality types thrive in the meeting environment you've outlined. The environment I'm envisioning based on what you've said is one where interruptions are the norm, you must be willing to talk over people to get speaking time, and you must be very socially assertive with your ideas.

I know many more-introverted people who wouldn't be comfortable in that environment. I know several talented engineers that wouldn't contribute ideas in that sort of environment. And I, myself, would probably leave a company if that sort of meeting was in the company's culture.