I don't know why I did that

Yesterday while we were in the kitchen, with me doing some cleanup, my wife just turned a burner on on the stove. Nothing on the burner. My reaction was much like you would react to a 3 yr old who did that. Later, I asked her why she did that. Her reply was telling for me. She said "I don't know why I did that" I realized that I can't treat her like a 3 yr old and yell at her to punish her like some pavlovian dog exercise. She's a grown adult. That response only offends her. That's the thing about dementia I'm learning. She did it but doesn't know why. It's frustrating and scary. Two days ago I notices holes in the turtleneck shirt she had on. She never liked this shirt because it was tight over her head. I found a pair of scissors on the laundry counter with chunks of the shirt next to it. She just started cuttin holes in the shirt. She didn't know why she did that. My sister in law, in assisted living with long haul parkinsons, just takes off out of her apartment down the haul and falls. The staff have threatened her telling her she has to be in a wheel chair at all times or they are moving her to memory care. That didn't work.
She is moving into memory care next tuesday. Now they have a full time person with her to protect her. She just doesn't know why she doesn't remember to get in the wheel chair despite constant reminders.
When I talked to my wife this morning and told her I realized she was not able to know why she turned on the burner, she teared up. I think everyone, me included, has done stupid things that later you say to yourself "Why did I do that?" With that there is some self awareness and self examination. With dementia, the self awareness and examination are gone. It's like a child before the sense of reason or learning takes hold. Such a weird thing to deal with...