Answer: Their audience may not understand what they are saying.
Explanation:
The main reason writers should avoid using too much jargon is because it may not be understood by their audience. Jargon refers to specialized language used by a particular group or profession, and using it in writing can make the text inaccessible to those who are not familiar with the terms. This can cause frustration and confusion for the reader, making it difficult for them to follow the writer's argument or message. Furthermore, using too much jargon can also make the writing appear overly technical or impersonal, which can distance the writer from their audience and undermine their ability to connect with them. For these reasons, writers should strive to use clear and accessible language, avoiding jargon whenever possible, to ensure their message is effectively communicated to their intended audience.