Answer:
They are considered too "fanciful."
Explanation:
In a speech that is directed to a specific group of people, the speaker should not use the techniques of metaphor and simile. The specific group could be a politician and in that kind of speech, the speaker should use formal language. The speaker should be oriented to the theme of speech and try to organize this speech with examples who are realistic due to the person who will hear the speech and be able to connect with the theme of the speech.
The speech can contain some metaphor or simile examples, but these can not overwhelm the speech and distract people's attention. The techniques of metaphor or simile are usually connected with poetry and literature. In a speech, the speaker chooses to tell the public about a specific topic in a way that the speaker thinks it is a formal, concise, convincing and serious.
