I think the distinction is need. I dont like it when its mandatory, but i dont mind that the option is there. E.g some people like preheaing their oven on the drive home(or a warning that something on the stove is on if accodently left on), or in case of the dryer, when its done.

One common one I think is helpful is those who may have forgotton to close their garage. Easy way to check without having to drive back and do so.