Software developers are quiet for a variety of reasons. In my career over 30 years as a software dev, things have only gotten worse. It's not because of Agile or introverts or any of that, it because people don't want to commit to anything or rock the boat. Why? Because the vast majority of software developers, especially in tech companies, are on a worker visa. Mostly likely an H1B. They don't want to get kicked out of the country at a moment's notice, as we saw so many sad stories with of workers with visas having to leave the country after being here for many years. That's why. You would do the same.