Your washing machine could be sending 3.7 GB of data a day — LG washing machine owner disconnected his device from Wi-Fi after noticing excessive outgoing daily data traffic
So you can manually put your laundry inside it, go to your bed and tell the machine to wash it like you didn't had to get up to put your laundry inside it.
Reporting when it finishes, allowing remote start, collecting statistics, downloading improved firmware to name few. None of these are essentials though.