> A toaster has feedback control over its temperature, time control over its cooking duration

Most toasters are heating elements attached to a timer adjusted by the human operator. It doesn’t have any feedback control. It doesn’t have any time control.

> I simply can't make toast without a toaster

I can’t make toast without bread either, but that doesn’t make the bread “responsible” for toasting itself.

> She does not understand how her toaster works.

My mum doesn’t understand how bread is made, but she can still have the intent to acquire it from a store and expose it to heat for a nominal period of time.