Okay so lemme get this straight.
You are trying to hack your 5 year old nephew's switch, expect no one to notice, and are not doing it for the nephew, but for you?
Not even asking permission?
I'm not gonna hack it. At least not until it;s out of warranty and he asks me to. His switch won't be hacked ever really. But I am using my real situation to argue the theoretical point on behalf of my future self and all other switch owners. His Swith won't be hacked. If it were, it'd be mostly for his benefit, as hed be playing the pirated games far more than me. He plays my pirated Wii U and 3DS games. Why are so caught up on the exact situation? I want the theoretical power to control the switch, so that I can control mine if i were to buy one, and so that the other parents can control theirs. I feel bad about all the parents who will lose because of their children. I'm not selfish. Even if I had a switch and never wanted to share it, I would still argue that it should be possible to better restrict them. It's about the freedom to choose.
You don't have to want to do something to be able to argue that people should have the freedom to do so. The actual parents can't control this Swith very well, especially not for a child that lives in multiple places and has multiple caretakers.