To be clear, you demonstrated the bias I was referring to by casting doubt on the intelligence or job-worthiness of the listeners rather than recognizing what I said about effectiveness being improved if you can get your message to more people.
As you can imagine, it's a solution that kills the product (or the company) in the long term.
Especially with efficiency culture where labor is often the first to be cut in the name of profit.
The fear is perfectly rational because managerial and C levels have made it clear that the person does not matter in the slightest. It would be foolish to outright trust management and is often how people are taken advantage of.
For reasons I'm not entirely sure I understand, I tend to be pretty analytic about this sort of thing and until my role started including the need to help people understand change it had not occurred to me that fear would overwhelm some folks rationality. But once you can see it, it is really clear that that is where their head is and the anxiety is consuming them.
[1] "Who Moved my Cheese" by Dr. Spencer Johnson -- https://www.amazon.com/dp/B004CR6AM4/