First of all, we must make sure that this law is feasible.
First of all, we should know that the physical development of minors is immature. They are not fully developed and their looks are not fixed. Many of them will become wider and their facial features will look better than before, so it is unwise to have plastic surgery so early. Plastic surgery is risky. Their bodies are not fully developed, and cosmetic surgery will harm their bodies, so it is feasible to ban them from cosmetic surgery.
The second is that their mental development is not very mature. They should still be in a state of blind pursuit of beauty, and they don't know what plastic surgery means, or they are too young. You should know that natural beauty is the most beautiful, and everyone is a different individual. There is no need to make their five senses so perfect. Defects are also a kind of beauty.
That's my own opinion. Thank you for browsing.