Li Shi made two simple points.
First, painting people of all ages and genders is a fundamental skill in painting and sculpture. Usually, in the eyes of a true artist, everything in the world is beautiful, and humans are the most beautiful. The human body encompasses all of a person's experiences, personality, and emotions. If one can't paint the human body well, it would be difficult to express its beauty.
It's just like writing an essay. If you can't even master wording and sentence construction, how can you write a quality article?
Li Shi tried his best to explain in the simplest and most popular terms. After thinking for a moment, he honestly continued with the second reason, "Moreover, artistic creation values talent highly. For me personally, of all the types of paintings, I have the highest talent for painting female portraits, so I need to venture into this area."