Final answer:
In Cicero's work De Oratore, he extensively discusses the topoi concept.
Step-by-step explanation:
In Cicero's work De Oratore, he is not criticized for blowing through the topoi concept. Instead, he extensively discusses the concept in great detail. The topoi concept refers to the common topics or arguments that can be used in a persuasive speech. Cicero emphasizes the importance of using these topoi effectively to make a convincing argument.