I have seen that interrogation video and I have no problem with her asking questions in a caring and patient way. In fact I would prefer all interrogations were like that one.

There are many, many, much worse examples.

The first one that comes to mind to me is when they interviewed that simple guy on the Netflix show, Making a Murderer. They basically told him everything would be ok if he just admitted to murdering someone, and prompted every detail by just badgering him. He had no idea how serious the charges were that he was admitting to, and clearly had no idea of the details of the murder until they prompted him. I'm sure he should have had a lawyer or guardian helping him, as you would with a child.

He's still in jail AFAIK.