I am a Chinese language major. Personally, I think lyrics are a kind of poetry in theory, because what we call Song Ci Yuan Qu is lyrics. But the status of words and songs is certainly not as high as that of metrical poems. But it follows the so-called metrical principle. However, we are biased against the lyrics of the senior high school entrance examination. You can't write them lightly. Lyrics like "Learn Meow" have no literary content. Lyrics like Vincent Fang are relatively well written. Considering that Vincent Fang's words in the senior high school entrance examination fully meet the assessment requirements of junior high school students, their level is still worse than that of poetry and literature, such as modern poetry and modern new culture. At the beginning of the movement, poetry was also very simple, but with people's cultural research, poetry also developed very well, such as Coal in the Furnace.
But I don't recommend risking writing lyrics. The teacher may not like it because it is too strange to correct the paper. Please be steady and stop writing, because you have hobbies.