Professional life span of game special effects artists

Hello, I would like to ask how long is the professional life of a game special effects artist? The professional life span of a game special effects artist is 20 years. The work intensity of game special effects artists is great, and it is difficult to join the job. The employees are all around 30 years old. Due to high-intensity work, they are generally unable to support their work at the age of 50. Therefore, the professional life span of game special effects artists is 20 years.