The US should establish 18 year term limits for Supreme Court Justices

In my opinion the US should not establish 18 year term limits for Supreme Court Justices for many reasons, since i will distribute them along the debate I decided to start with just one of the many motives, and that is...

-the responsibility for the action that we commit.

According to many sites, like dictionary.com the definition of responsible is: answerable or accountable, as for something within one's power, control, or management. According to people that decide to spread their ideas on sites like Quora, a child becomes totally aware of appearance only at the age of 6, a lot before than the age minors commit crimes according to various statistics. So following common sense and logic a person could easily understand that minors committing crimes completely aware and responsible for what they're doing, and so they should be punished the same way as an adult.