Surely the bush itself cannot be responsible for its own pruning, that would be a conflict of interest. Anyway, it's always best to start pruning at the top.
If the speaker can convince the listener they should find a job where they don't need to speak as part of the job description. Dishwashers and janitors give pletnly of job stability for people like those.
I was too abstract. I meant that when a message is misunderstood by a large enough chunk of the audience it's the speaker's fault for not knowing their audience and their needs.
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.