Modern medicine can't explain what acupoints are, but from the practical point of view, some diseases can be alleviated and treated by using acupoints and meridians. According to China's ancient medical theory, acupoints can be treated by pressing or acupuncture. Although foreign countries do not accept acupoints, some countries have liberalized acupuncture, which is more effective in relieving pain.
Martial arts novels have been further developed and some storylines have been invented. It is said that two fingers can hold people and make them dumb. I haven't heard much about any "master" who has practiced to this extent. Most of these legends do not exist. However, as mentioned above, acupoints are distributed in the weak parts of the human body, and striking hard may indeed cause danger.
In boxing and other fighting fields, sometimes hitting the chin or temple can directly stun people and even cause fatal accidents; In some cases, some people died of blunt objects in weak parts. Boxing and blunt trauma may indeed hit some acupoints, which is no different from the so-called "acupoint selection" principle, but it is not good to pull out acupoints. Modern medicine has a clearer understanding of the human body, such as the back of the head, elbows, chin and other places where important nerves and blood vessels pass. Even a person who doesn't understand acupoints can know from real life experience that these positions are weak.
Like temples, hard collisions can lead to fractures and possibly concussions. Some acupoints in the waist are located behind the spine. A violent blow may break the spine and tear the paralyzed spinal cord.
Martial arts novels are all written for fun. In reality, I have never heard of acupuncture killing people. There are many acupoints on the soles of the feet, but many people with foot injuries can't live well.