The composition topic of the final exam is laughter. I wrote that I heard a joke and then laughed (I focused on writing jokes). Is this beside the point?

Not exactly. The composition can be divided into two parts: the meaning of the topic, the main idea of the article is exactly the same as the questioner's intention; Can divide the meaning of the question, not far from the questioner's intention, can touch the edge of the question; Deviated from the meaning of the topic, misunderstood, and divorced from the writing scope required by the topic.

The composition proposition is laughter. What you wrote fits the question. You should write out the meaning of "laughter" and elaborate it in depth. What you write can only be said to be "laughing".

But the intention is too low, and the estimated score is a little higher than the upper limit of digression.