You've got the paradigm backwards. Cooking is a service. The closest thing to "as a service" would be your microwave requiring a subscription to cook some ram

You've got the paradigm backwards. Cooking is a service. The closest thing to "as a service" would be your microwave requiring a subscription to cook some ramen in your own home. It's blatantly possible to be done without the subscription, but is added as a way to capture more revenue.