Do you have a reason why you're pretty sure plenty of people feel that way? The causal mechanism you're proposing for their silence—chiming in and getting admon

Do you have a reason why you're pretty sure plenty of people feel that way? The causal mechanism you're proposing for their silence—chiming in and getting admonished for it—would lead evidence that I don't see. Unless you're suggesting that people just assume they'll get chided?