[Arxryl]

Judging that the child has had no previous experience with a stove, yes. I'd say it isn't stupid.
You do understand that teenagers have more knowledge than littler kids right? Assuming that's correct, the teenager "should" know not to touch a stove when it's on (due to previous experiences or not) and they "should" be smarter than half the people I know today who are currently teenagers. Younger children don't know all of the things we do, so over half, if not all, of their knowledge is from experience. We know more, but we choose to ignore it a lot of the time.