Leaving circuit breakers on during vacation like holiday trips, except for essential devices like heating system for freezing protection and refrigerators, may be a problem in some insurance contracts. There were cases in Europe where appartments were left only for a 2 hours' shopping without switching off all electric items, and the laptop's power supply plugged into the 230V outlet started a fire. The insurance refused to pay the damage and won in court.
A look into the insurance contract(s) may help.
In Europe, most domestic fires start in the kitchens.
As mentioned in other comments, pets and non-pet animals, sleep walkers, older people with Alzheimer, a long emotional telephone call - normal ovens and plates have a certain risk.
One way to reduce the risk is to replace normal electric oven and hotplates with a combined microwave oven (MW + grill + oven) and induction plates.
A MW oven can only operate if the door is closed, and the time is automatically limited. Induction plates do only operate if a pot or pan is put on the plate, and the time is limited, too. The plates do not get hot by itself, but only indirectly by the contact with the pot - the temperature will be much lower compared to ceramic or convection plates.
Both devices can be each operated by a standard inexpensive switch - f.e. a plug- in adapter switch with indicator lamp -, since the wattage is less enough (f.e. 16A @ 230V).
The low temperature of the plate is saving time and energy in multiple ways - f.e. the danger of burning-ins in the plates or their surrounding from over-boilings is much less saving again energy/chemical detergents and time.
So by saving energy costs, the investment should be returned in a couple of years. And of course, it is more environment-friendly.