miss the point - Phrases/Idioms
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Overlook or fail to understand the essential or important part of something, as in Chris missed the point of Gwen's complaint, thinking she was opposed to the date of the next meeting. This expression employs point in the sense of “the salient portion,” a usage dating from the late 1300s.