Nintendo Switch: How do I prevent a child from using the adult user?

The adult user is far as I know not with a code lock. My son can simply select my account for games if he wants to bypass the age restriction and do everything he wants (sudo). So the whole system is completely useless. Can someone help me how to protect this on a switch with adult and child account?

You could also raise your child that it respects the parents and does not deceive ♂️

Just sayin

Funny. Then I do not need the entire age restriction system. And if you have nothing to contribute, you can also save comments.

Ridiculous…

Pardon?

In a nutshell. It lacks a password / code for the adult user