First, in terms of personality, she is a very independent person with a strong personality. Obviously, she has entered the palace, and it is time to make plans for her future. However, she doesn't seem interested in these things. She regards herself as the daughter of an ordinary family, not seeking wealth, but single-mindedness.
Such a person who is indifferent to fame and fortune, even if he is not framed by Mao Yanshou, will not compromise his mind for wealth, flatter the emperor and have no enthusiasm for the emperor, so he will not use the means of harem struggle, so he will not become the emperor's favorite. Moreover, she is a person who has a home country in her heart. If there were other opportunities, she would still choose to go to Xiongnu to exchange peace for the people.
Second, at that time, the Han Dynasty sent princesses to kiss the Huns, which was a common occurrence in the Han Dynasty. But the real princess has to leave her hometown and marry the Huns, so the royal family will let some ladies-in-waiting kiss instead of the princess, and Wang Zhaojun is an ordinary lady-in-waiting who was ordered to kiss the wrong one.
Third, the harem is a world of intrigue. It is difficult for Wang Zhaojun to survive in the harem because he doesn't like fighting. Perhaps Wang Zhaojun's departure has something to do with the design of the concubines in the harem. Without Mao Yanshou, there would be no Zhu Yanshou and li yanshou.
Therefore, Mao Yanshou's framing is only the direct reason, not the main reason. I personally admire Wang Zhaojun very much. For the people, there were several women in ancient China who could do this, and this spirit is worthy of praise from future generations.