You shouldn’t expect any single strategy to solve all possible problems. The course of action I recommended is, I believe, a good way to fix the problem described in the original post. If you also want to solve this different problem, you will probably have to also take a corresponding different course of action.
This seems useless at learning how to deal with people who are wrong, and instead reinforces the “life is an academic debate” meme.
You shouldn’t expect any single strategy to solve all possible problems. The course of action I recommended is, I believe, a good way to fix the problem described in the original post. If you also want to solve this different problem, you will probably have to also take a corresponding different course of action.