I think you might be conflating macro and micro. At the level of a single issue it can be effective if used sparingly.

The argument, as I understand it, is that frequent and continued use of these techniques over time lead to those issues.

Anecdotally I have had several conversations with younger, misguided men, that considered the suppression of holocaust denial information was proof that it never happened. In their logic, why would would some much effort be placed in suppressing this information if it was so obviously false.