Why the belief in rehabilitation is a dead end

‌"Juvenile offenders must be imprisoned to be reformed"... America's shocking experiment. Naver News Editor. Every time I come across news about juvenile crime, I feel a surge of anger. It is unjust that people receive light punishments simply because they are young, even after committing murder or horrific acts of violence. To truly teach a lesson, we must show them that committing bad acts comes with severe consequences.
Looking at the article, the conclusion drawn was foolish.
For violent criminals acting with intent, it is an expression of their innate genetics, so the very concept of rehabilitation cannot exist.
For such individuals, the best method is to deprive them of the opportunity to commit crimes altogether.
I also believe that the legal protections for juvenile offenders should obviously be abolished for these types of crimes.